Porsche 993
From Wikipedia, the free encyclopedia
| Porsche 993 | |
|---|---|
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| Manufacturer | Porsche |
| Also called | Porsche 911 Porsche Carrera |
| Production | 1993–1998 |
| Predecessor | Porsche 964 |
| Successor | Porsche 996 |
| Class | sports car |
| Body style | 2-door coupe 2-door convertible |
| Layout | rear-engine, rear wheel drive |
| Engine | 3.6 L flat-6 3.8 L flat-6 |
| Similar | BMW M3 Dodge Viper Ferrari 348/F355 Honda NSX Mazda RX-7 Nissan 300ZX Nissan Skyline GT-R Toyota Supra |
| Designer | Tony Hatter |
The Porsche Type 993, or simply 993 (nine-nine-three or nine-ninety-three), was the version of Porsche's 911 model produced from late 1993 through early 1998, replacing the 964. Its discontinuation marked the end of air-cooled Porsches, giving it a special place in the hearts and minds of enthusiasts.
As before, Porsche made several variants of the 911 to satisfy every driver. The Carrera was reliable, safe and fast, and was the sports car you could use every day; the Carrera Cabriolet and Targa were ideal for sporty cruising; the 180mph Turbo and Turbo S were supremely quick; and the uncompromising Carrera RS and GT2 were race-oriented.
Contents |
[edit] Overview
[edit] Technical improvements
One of the most noteworthy changes in the 993 over all preceding 911s is the implementation of an all-alloy multi-arm rear suspension attached to an all-alloy subframe. Its design was derived from the project 989, a four door sedan which never went into production, and was later continued in the 993's successor, type 996. It required the mentioned widening of the rear wheel arches, which itself leant to the 993's new-found stability. This suspension improved the 993s cornering abilities, making it more direct and more stable and helping to reduce the infamous tendency to oversteer if throttle was lifted during hard cornering found in earlier 911s. It even contributed to reduced interior noise.
The 993 was the first generation of 911s to have a standard 6-speed manual transmission — previous cars, except for the exotic Porsche 959, had 4- or 5-speed gearboxes. As the 993 was capable of speeds exceeding 270 km/h, a sixth gear became necessary in order to cover this speed range. In virtually every situation, it was possible to keep the engine in its best torque range above 4500 rpm. The Carrera / Carrera S / Cabriolet and Targa models (2WD) were further available with a "Tiptronic" 4-speed automatic transmission, first introduced in the 964. Beginning with model year 1995, Porsche offered the advanced Tiptronic S with additional steering wheel mounted controls and refined software for smoother, quicker shifts. Since the 993's introduction the tiptronic is capable of recognizing climbs and descents.
Further, the 993s optional all wheel drive system was refined over that of the 964. Porsche departed from the 964's setup consisting of three differentials and revised the system based on the layout from their 959 supercar, replacing the center differential with a viscous coupling unit. In conjunction with the 993s redesigned and recalibrated suspension, this system vastly improved handling characteristics and still retained the stability offered by AWD without having to suffer any compromises in understeer. Its simpler layout even reduced the system's weight. The advantages of this concept were reason enough for Porsche to retain it in all succeeding 911s with AWD.
Other improvements include a new dual-flow exhaust, larger brakes with drilled discs, a revised power steering, etc.
[edit] 993 Variants
[edit] Carrera Coupe / Cabriolet
The Carrera resembles the "base model" of the 993. It was equipped with the naturally aspirated 3.6 liter M64 engine, further developed from the 964 and combined with a new dual-flow exhaust system featuring now two catalytic converters. In contrast to the 964, Porsche deleted the "2" from the "Carrera" name tag.
The option list of the 993 Carrera (and most other variants) was very long and offered the possibility to configure highly individualized cars: it included up to five different sets of wheels, various suspension set-ups, at least three different seat styles (comfort, sport, racing), uncountable upholstery options including the possibility to have almost any interior element of the car covered with leather, wood or carbon, and various hifi-systems including digital sound processing. Further, Porsche offered to paint the car in any color the customer chose. Even more, the Tequipment- and Exclusive-Programs added further options and built to order almost any specific wishes of customers such as special consoles or even fax-machines or bright yellow interior upholstery.
The Cabriolet, introduced 1995, features a fully electrical softtop reinforced with metal sheets and an automatic windblocker.
Both versions were available with all wheel drive under the tag 'Carrera 4'. From outside the Carrera 4 is distinguishable by clear front turn markers and rear red markers (each instead of orange). The brake calipers are painted silver as is the 'Carrera 4' badge on the hood. The center wheelcaps carry the Carrera 4 logo instead of the Porsche crest.
In contrast to most of the following other variants, production of the Carrera Coupe and Cabriolet ceased in 1997 with the end of model year 1997, except for a very few produced in a shortened 1998 model year.
[edit] Targa
The Targa version of the 993 was introduced in model year 1996 and saw the debut of a retractable glass roof, a design continued on the 996 and 997 Targa. The glass roof would retract underneath the rear window revealing a large opening. A shade was there to help prevent the greenhouse effect of the closed roof. This system was a complete redesign, as previous Targa models had a removable roof section and a wide B-pillar functioning as a roll bar. The new glass roof design allowed the 993 Targa to retain the same side-on profile as the other 911 Carrera variants and finished with the inconvenience of storing the removed top of the old system. The Targa has the body of the Cabriolet with the Targa glass roof replacing the fabric roof.
The Targa was equipped with distinctive 2-piece 17 inch wheels, which could be ordered as an option on all cars not having standard 18 inch wheels. These distinctive split rim wheels for the 993 Targa where actually much heavier than normal in order to offset the extra weight of the Targa roof, to balance the center of gravity.
A classic limited production vehicle.
Production Numbers: 1996:814? 1997:? 1998:? Total Production Run 933 911 Targa: 2442
[edit] Turbo
The 993 Turbo coupe was released in 1995. It featured a new and widely acclaimed turbocharged engine displacing 3.6 liters. Twin turbochargers and air-to-air intercoolers, electronic engine management, redesigned cylinder heads and other modified engine internals were used. The 993 Turbo was the first Porsche Turbo with all wheel drive. The electronic engine management helped the Turbo to achieve fuel efficiency far superior to any of the previous production Turbos. In connection with two catalytic converters and an on-board-diagnostics-system including four oxygen-sensors, it also made the 993 Turbo the cleanest sports car at its time. The Turbo's bodyshell differs from the Carrera body by widened rear wheel arches (approximately 6 cm), redesigned front and rear bumper moldings, and a fixed rear wing housing the intercoolers. New 18 inch alloy wheels with weight-reducing hollow spokes were standard.
[edit] Turbo S
During the second to the last year of production of the 993 (1997), Porsche offered the 993 Turbo S. Ultimately 375 pieces were sold. The Turbo S is a fully loaded Turbo including a power upgrade to 424 hp (SAE) for the American market and to 450 hp (DIN) in other markets. The inclusion of every thinkable amenity including carbon fiber decoration in the interior makes it different to the earlier lightweight, spartanic 964 Turbo S. The 993 Turbo S is easily recognized by yellow brake calipers, a slightly larger wing, a 4-pipe exhaust and air scoops behind the doors.
[edit] Carrera 4S / Carrera S
The Carrera 4 S (1996) and later Carrera S (1997) shared the Turbo model's bodyshell, but housed the naturally aspirated Carrera engine in the rear. The 4S came with four wheel drive, and retained the Turbo model's larger brake discs with the characteristic red callipers. It could be described as a "Turbo without the turbochargers and rear wing", whereas the S was in all aspects a standard Carrera underneath (the wider rear fenders were compensated with 31 mm wheel spacers). Both S models had slightly lowered suspension compared to standard Carrera models. The wide body is widely acclaimed for its rear looks, but creates more aerodynamic drag, leading to slightly lower top speeds compared to the narrower siblings (about 5 km/h).
In particular, the Carrera 4S is a popular car. It has much in common with the 30th anniversary-model of the Porsche 964, a naturally aspirated, 4WD Carrera 4 in a Turbo bodyshell. The success of that car caused Porsche to build more than the 911 cars originally planned. After the 993, Porsche continued this model with the 996 Carrera 4 S, again a "Turbo without turbochargers and rear wing".
[edit] Carrera RS
The Carrera RS is a no-compromise lightweight variant of the Carrera. It features a naturally aspirated 3.8 liter engine with 300 hp (DIN). On the outside, it is easily distinguishable by a special non-retractable rear wing, small front flaps and 3-piece 18 inch aluminum wheels. A closer look would reveal that the headlight washers were deleted for weight saving reasons. Inside the rear seats were deleted, and special racing seats and spartan door cards were installed. Sound proofing was reduced to a minimum.
There exists further RS variants, in particular a track-oriented Carrera RS Clubsport with only limited road usability. The Clubsport has a welded roll cage, and certain comfort features deleted, such as carpets, power windows, a/c and radio. It carries a larger rear wing and deeper chin spoiler.
The Carrera RS was produced in model year 1995 and 1996. It was street legal in European and many other countries, but was not exported to the US. As with the low-quantity RS variants of previous 911 types, owners sometimes attempt to turn their Carreras into RS clones due to the high market value of the RS (in European markets, a well maintained RS could easily achieve a 50 per cent premium over a standard Carrera; list prices showed a 15 per cent premium).
[edit] GT2
The GT2 is best described as the race variant of the Turbo. For weight saving reasons the 4WD was deleted. The interior is similar to the Carrera RS. The fenders of the Turbo have been cut and replaced with bolt-on plastic pieces in order to accommodate large racing tires and to ease the repair of damages to the fenders often occurring in racing.
Until 1997, the GT2 had almost the same engine as the Turbo, but delivering 430 hp (DIN). In the last year (model year 1998) output was raised to 450 hp (DIN) and twin ignition was added.
The many racing variants have different engine set-ups depending on the applicable racing series. Power output came as high as 600 bph in a "Evo" version designed for the GT1-series, which was ultimately replaced by the mid-engine 911 GT1.
[edit] Speedster
In Porsche terms, 'Speedster' stands for a Convertible with lowered roof and windshield and a rather spartanic interior.
In contrast to the G-model and the 964, Porsche never officially released a 993 Speedster. However, two were built by the factory: a dark green Speedster equipped with Tiptronic S and 17 inch wheels for Ferdinand Alexander Porsche (his 60th anniversary) in 1995 and another wide-body, silver Speedster with manual transmission and 18 inch wheels for American TV star Jerry Seinfeld in 1998.
[edit] Turbo Cabriolet
After the 3.3 liter G-model Turbo convertible (1987-89), Porsche never officially offered an air-cooled Turbo convertible again. However, in 1995 14 993 Turbo Cabriolets were sold before the introduction of the 993 Turbo coupe. They featured the 360 hp (DIN) single-turbo engine of the 964 Turbo 3.6, a 5-speed manual transmission and the wing of the 964 Turbo 3.6. This required a premium of DM 89,500 (or plus 62%) over the standard 993 Cabriolet's price.
[edit] Engines
The 993 is powered by the legendary air-cooled Porsche flat-six. Porsche had begun employing this engine in the Porsche 901 in 1963 at 2 liters capacity with 130 hp (DIN) output.
Any engine in any 993 variant is a derivative of the M64. The standard, naturally aspirated M64/05(06) engine at 3.6 liters capacity is a refined version of the M64/01 installed in the 964 Carrera. At first, the M64/05(06) made 272 hp (DIN) through 1996, before Porsche switched to the VarioRam-equipped M64/21(22) engine, and power output increased to 285 hp (DIN). Slightly more powerful versions with 3.8 liter were available in the Carrera RS and as build-to-order options throughout the 993's lifespan.
The 3.6 liter twin turbo M64/60 engine produces 408 hp (DIN), although more powerful versions (430 and 450 hp (DIN)) were available as build-to-order options, in the Turbo S, and in the GT2. Depending on the country, Porsche still offers 430 and 450 hp (DIN) kits for the Turbo.
[edit] Historical perspective
The 993 was the last generation Porsche 911 to feature air-cooled engines and to retain the classic silhouette. Even though the 993's roots trace directly back to the first Porsche 911/901 of 1963, it had no difficulties in meeting or even succeeding the standards for contemporary high-performance sports cars. Many Porsche enthusiasts regard the 993 as the last and most advanced of the "true 911", i.e. the last of the legendary air cooled Porsches.
By the end of the 993's lifespan in 1998, Porsche had produced 409,081 Porsche 911. In only 4 out of 35 years the 993 contributed almost one fifth to this figure, leaving it behind as one of the more successful 911 derivates.
There are several reasons why Porsche nevertheless gave up their crown jewel of the classic 911 when the Type 993 was replaced by the Type 996 (launched for model year 1998), which featured an entirely new design with water cooled engines. The most prominent reason was that it had become increasingly difficult to meet ever stricter emissions and in particular noise regulations with the air-cooled engine. In addition, Porsche had no choice but to step up to 4-valve cylinder heads to maintain a competitive power to volume ratio, as the experiences with various racing engines and with the Porsche 959 showed that 4-valve technology would only be feasible with water cooling. Nevertheless, these foregoing problems could possibly have been solved by implementing a water-cooled engine into the classic 911 platform (as was done in the 959). However, the 993 did not fit into Porsche's strategy to implement lean production methods and to exploit economies of scale by building an entry-level roadster (the Porsche Boxster) sharing various parts with the 911 series.
The 993's comparatively short lifespan of 4 years raises the question of why Porsche took the effort to implement this amount of changes to the then young design of the Porsche 964. The Porsche 996 (and Boxster) concept was decided upon in 1991 and several more years had to pass before the Porsche 996 could enter the market. At the same time, Porsche was troubled with very low demand in the U.S. requiring Porsche to take its policy of selling cars meeting highest technology standards more serious than ever. Even though the 964 was an excellent sports car, in the 993 Porsche refined flaws of the 964 and developed the innovations begun with in the 964. Not only the visual modernization attracted new customers, but the Porsche 993 was technologically advanced enough that even nowadays it leaves its traces: the multi-arm rear suspension, the 4WD concept, the dual-flow exhaust, and the Targa roof in the 996 / 997 derive from 993's technology. With the launch of the 993, Porsche gained precious time to develop the Porsche 996 and Boxster.
Traces of the 993 may even be found as lately as in the 2005 Porsche 997, in fact a redesigned 996. The 997's round headlights and front fenders, separate front turn signals and fog lights, and widened rear wheel arches keep the 993's style alive.
[edit] Performance
| Performance data: Porsche 993 | |||||||
| Model (Source) | 0-60 mph | 0-100 km/h | 0-160 km/h (100 mph) |
0-200 km/h | 1/4 mile | 1 km | Top speed |
|---|---|---|---|---|---|---|---|
| Carrera 2 ROW 1994 (Manufacturer) |
? | 5.6 s | ? | ? | ? | ? | 270 km/h |
| Carrera 2 ROW 1994 (Auto Motor Sport 1993) |
? | 5.3 s | 12.4 s | 21.1 s | ? | 24.7 s | 267 km/h |
| Carrera 2 Tiptronic 1994 (Manufacturer) |
? | 6.6 s | ? | ? | ? | ? | 265 km/h |
| Carrera 2 3.8 300 hp ROW 1995 (Sport Auto 11/94) |
? | 5.2 s | 11.4 s | 18.7 s | ? | ? | 287 km/h |
| Carrera 2 US 1995 (Road&Track Jan/94) |
5.2 s | ? | 13.3 s | ? | 13.8 @ 102 mph | ? | est 168 mph |
| Carrera 4 US 1995 (Road & Track Jan/95) |
5.7 s | ? | 14.0 s | ? | 14.1 @ 100.5 mph | ? | est 168 mph |
| Carrera 2 1996/1997 (Manufacturer) |
? | 5.4 s | 12.3 s | ? | ? | ? | 275 km/h |
| Carrera 2 Tiptronic 1996/1997 (Manufacturer) |
? | 6.4 s | 13.8 s | ? | ? | ? | 270 km/h |
| Carrera RS ROW 1996 (performance car Mar/96) |
4.7 s | ? | 11.2 s | ? | 13.2 @ 109 mph | ? | ? |
| Targa ROW 1996 (Auto Motor Sport 20/95) |
5.5 | 5.5 s | ? | 21.3 s | ? | ? | 172 mph |
| Carrera 4S ROW 1996 (Sport Auto 12/95) |
? | 5.5 s | 13.2 s | 23.0 s | ? | ? | 270 km/h |
| Targa Tiptronic 1996 (Sport Auto Dec/95) |
? | 7.1 s | 15.4 s | 27.3 s | ? | ? | 270 km/h |
| Carrera 4S US 1997 (Car and Driver Jun/96) |
4.9 s | ? | 12.8 s | ? | 13.5 @ 102 mph | ? | 161 mph |
| Carrera S 1997 (Sport Auto 02/97) |
? | 5.7 s | 13.3 s | 22.7 s | ? | ? | 270 km/h |
| Turbocharged versions | |||||||
| Turbo 1995-1998 (Manufacturer) |
? | 4.5 s | ? | ? | ? | 23.0 s | 290 km/h |
| Turbo 1995 (Auto Motor Sport 1995) |
? | 4.3 s | 9.5 s | 15.1 s | ? | 22.4 s | 291 km/h |
| GT 2 1995 (Auto Motor Sport 1995) |
? | 4.0 s | 8.4 s | 13.3 s | ? | ? | 296 km/h |
| Turbo 1996 (Road&Track Jul/95) |
3.9 s | ? | 9.9 s | ? | 12.5 @ 112.5 mph | ? | est 180 mph |
| Turbo S 1998 (Car and Driver Jul/97) |
3.7 s | ? | 8.8 s | ? | 12.2 @ 114 mph | ? | 188 mph |
| Where identified ROW/US stand for applicable gear ratios | |||||||
[edit] References
- Streather, Adrian (2005). Porsche 993: The Essential Companion (first edition). Veloce Publishing. ISBN 1-904788-94-7
- Bongers, Marc (2004). Porsche - Serienfahrzeuge und Sportwagen seit 1948 (first edition). Motorbuch Verlag. ISBN 3-613-02388-1
- Frère, Paul (2002). Die Porsche 911 Story (revised and last edition). Motorbuch Verlag. ISBN 3-613-02225-7
- Porsche, Christophorus, Issue no. 5 (September) of 1993, pages 11 ff. ISSN 0412-3417
[edit] External links
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