The Nissan 180SX was a hatchback coupe (though Nissan marketed it as a fastback in most of its markets) based on the S13 chassis from the Nissan S platform, and sold only in Japan (although sold in some other countries under the 200SX name)[1]. It was sold as a sister model to the Nissan Silvia from model year 1989 through 1998. The S13 Silvia was discontinued in 1993, but the 180SX was successful enough to convince Nissan to keep it in the market for the full length of the next generation Silvia's tenure. The 180SX differed from the S13 Silvia in that it featured pop-up headlamps, and a fastback roof with a liftgate. Specifications and equipment were similar, however the naturally-aspirated CA18DE engine was not offered.

The name 180SX was originally in reference to the 1.8 liter displacement CA18DET engine used in the chassis. In 1991, however, the engine was upgraded to a 2.0 liter model, offered in two forms: the naturally-aspirated SR20DE engine and the turbocharged SR20DET variant. Although the new engine was of larger displacement, the 180SX nomenclature remained. A common body modification to the 180SX and its sister car, the North American 240SX fastback, is the Sileighty conversion.

180SX was also a trim level of the S110 Silvia in Europe. The badges for this model read "Silvia 180SX", so this car is not properly a 180SX by model, but a version of the Silvia instead.

Like the Japanese 180SX SR20DET discrepancy, European, as well as South African models of the S13 chassis were called 200SX though equipped with the CA18DET engine.

Nissan Silvia (S15)

S15 Silvia Spec-R Aero
Production 1999–2002
Body style(s) 2-door coupe, 2-door convertible
Layout FR layout
Engine(s) 2.0 L DOHC-I4 (SR20DE), 160-165 PS
2.0 L DOHC Turbo-I4 (SR20DET), 225-250 PS

Transmission(s) 5 or 6 speed manual transmission
4 speed automatic
Wheelbase 99.4 in (2525 mm)
Length 175.0 in (4445 mm)
Width 66.7 in (1695 mm)
Height 50.6 in (1285 mm)
Curb weight 2650-2800 lb (1200-1270 kg)
Japan saw a new version of the Silvia (S15) in 1999, now boasting 250 hp (184 kW) from its SR20DET engine, thanks to a slight turbocharger upgrade, as well as improved engine management. The SR20DE (non-turbo motor) featured only 165 hp (121 kW).

The S15 Silvia included aggressive styling inside and out; upgrades to the chassis and suspension, including increased use of light alloy suspension components; and for the first time, a six-speed manual transmission (in addition to a 5-speed manual transmission and a four-speed automatic). Also for the first time, instead of a viscous limited slip differential, the S15 offered a more effective helical limited slip unit.

For the S15 Silvia, the model lineup was initially simplified to just the Spec-S (non-turbo) and Spec-R (turbo), both models offering an "Aero" variant with a large rear wing and mild ground effects. The Spec-R featured the available 6-speed manual transmission, increased body and suspension rigidity, 4-piston front brake calipers, a larger brake power booster, the upgraded helical limited slip differential, and HICAS (High Capacity Active Steering) four wheel steering as an option; the Spec-S featured only a 5-speed manual transmission (in addition to a 4-speed automatic available on both the Spec-S and the Spec-R), lacks the additional support structures of the Spec-R, 2-piston front brake calipers, a slightly smaller brake power booster, and the viscous limited slip differential.

The line was later expanded to include various luxury and upgrade option packages for both the Spec-S and Spec-R. Autech, a specialty car developer, also offered several tuned versions of the S15; one with body and interior trim modeled after the Ferrari 456, called the style-A, available in both Spec-S and Spec-R based trims; and a second tuned version was based of the Spec-S trim level with the engine output increased to 200 hp through the use of increased compression, more aggressive camshafts, and free-breathing intake and exhaust tracts, along with ECU tuning and upgrades to the chassis and suspension. This version also included the 6-speed transmission and other upgrades normally found only in the Spec-R.

There was also a convertible variant of the Silvia, called the Varietta, featuring a folding retractable hardtop. The Varietta was built by Autech and was based on the Spec-S model, featuring the same naturally aspirated engine, with a choice of the 4-speed automatic transmission or the 5-speed manual transmission.

Production of the Silvia ended in August of 2002 amidst Nissan's efforts to reduce its myriad of platforms. Nissan's sole sports car platform in the world is now the FM Platform, which underpins the current Fairlady Z and Skyline; marketed in the United States as the 350Z and Infiniti G35 respectively.

Nissan Silvia (S14)

1993-1996 S14 (Zenki)
Production 1994-1998
Body style(s) 2-door coupe, 2-door convertible
Layout FR layout
Engine(s) 2.0 L DOHC-I4 (SR20DE), 160-165 PS
2.0 L DOHC Turbo-I4 (SR20DET), 225-250 PS

Transmission(s) 5 speed manual transmission
4 speed automatic
Wheelbase 2525 mm (99.4 in)
Length 4498 mm (177.0 in)
Width 1727 mm (68.0 in)
Height 1288 mm (50.7 in)
Curb weight 1253 kg (2762 lb)

1996-1998 S14 (Kouki)The S14 Silvia debuted in Japan at the end of 1993. It was lower and wider than the S13. New rounded styling contributed to the illusion of a much greater increase in size than actually occurred. Wheelbase and track were both increased, leading to slightly improved handling. Unlike export markets, where sales of the S14 chassis variants faltered, the Silvia remained popular in Japan.

Trim level designations were similar to the S13, however the Club Selection package was dropped. "Aero" variants of the Q's and K's were offered that featured large rear wings and mild ground effects.

The S14 Silvia K's received a new version of the SR20DET, boasting a slight bump in power due to the implementation of Nissan's variable valve timing system, VTC, and a larger T28 turbocharger.

There was a mild styling update to the S14 during 1996, which added aggressive-looking projector headlamps and tinted taillights to all models. Fascias and other exterior trim pieces were also revised. The turbocharger now used a more efficient ball bearing center section. This updated version is popularly known as the kouki (後期, literally "latter period") S14, or by entusiasts as the CS14. The final model year of S14 production in all markets was 1998.


270R
The Nismo 270R was a limited edition vehicle developed by Nissan Motorsports. The vehicle was built on the S14 chassis but had many enhancements over the Silvia. Only fifty 270Rs were ever built and they were only produced in 1994. The '270' is in reference to the horsepower of the unique car as opposed to the displacement of the engine (as other vehicles, including the 240sx, were previously named upon). The 270R featured a vented hood, Nismo 'Edge' Aero kit, heavy duty clutch, 2-way limited slip differential, and a front mount intercooler among many other upgrades. All the 270s were painted black with 'Nismo 270R' badging above the rear wheels and a product numbered plaque in the glove compartment.


Autech K's MF-T
Tuning company Autech, has a tuned adaption of the S14a King's variant. This includes Aero style HUD with white displays and gauges for oil pressure, boost, and voltage in the centre console, along with a MOMO steering wheel and leather gear knob. The interior trim is also revised.

Handling improvements include multi-link suspension, firmer shocks and springs, front strut brace, and a rear sway bar. A large F40 style rear spoiler and aero bodykit with Autech indicators are also fitted. An "Autech Version K's MF-T" badge and sticker can be found on the boot.

An IHI ball bearing turbo was fitted in favour of the Garrett T28 for slightly quicker response and flow. Larger 480cc Injectors found in the later S15 Spec R's were also fitted as well as a thicker 80mm intercooler also found in S15's. To help expel exhaust, a higher flowing Fujitsubo Giken (FGK) exhaust was fitted.

The engine is an Autech-tuned SR20DET that produces 182kW (245HP).

According to the Autech website, the vehicle is still available at a cost of ¥2.99 Million Yen ($USD26875).