Infiniti G 20

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Keywords: Infiniti G 20
Description: The G20 was Infiniti's entry-level luxury car during most of the 1990s and into the 2000s. The G20 was a product of badge engineering as it was virtually identical to the non-USDM (United States

The G20 was Infiniti's entry-level luxury car during most of the 1990s and into the 2000s. The G20 was a product of badge engineering as it was virtually identical to the non-USDM (United States domestic market) Nissan Primera sedan, although the G20 offered a different variant of Nissan 's 2.0 liter inline 4-cylinder engine. Two generations of the G20 exist in the United States, the HP10 (P10), built from 1991 to 1996, and the HP11 (P11), built from 1999 to 2002. Two major trim packages were offered: Touring, badged G20t, available from model years 1994 to 1996 and 1999 to 2001, and Sport (with no badge modification) which was offered during model year 2002. All G20s were front-wheel drive and were built in Oppama, Japan.

The G20 was marketed in the United States as a competitor to European luxury sport coupes such as the BMW 3-series. reflected in advertisements with the tagline "Born in Japan, Educated in Europe, Now Acclaimed in America." Despite the lofty ambitions of the Nissan marketing department, it only achieved niche status as a competitor to other contemporary offerings from Acura and BMW.

The G20 was powered by a transversely mounted DOHC NA reciprocating internal combustion engine. the SR20DE. a 2.0 liter (1998 cc) Inline 4-cylinder. This engine was also shared with the USDM Nissan Sentra /Nissan 200SX SE-R, Nissan NX2000. and a host of non-USDM Nissan vehicles. The particular engine used in the G20 produced 140 crank horsepower at first, and 145 in '00+ editions (116 to 126 whp ; stock range) and 132 lbf or 136 lbf of torque (111 to 120 wft·lbf ; stock range). These engines were also fairly high-revving with a redline of 7450 rpm for 1991 through 1996 editions, 6950 rpm for the 1999 edition, and 6750 rpm for 2000+ editions. Like other SR-powered cars, the G20 has become extremely popular among "tuners " who like the engine for its flexibility, reliability, fuel economy and high power-handling capabilities. These factors combined with a low buy-in cost have caused used SR-powered Sentras, 200SXs and G20s to become popular and prominent in the tuner or "import scene " subculture.

Forced induction (turbocharging ) is often used to upgrade SR20DE powered G20s to higher levels, as much as 200 to 300 whp. Because the turbocharged SR20DET has a very similar design to the SR20DE. many components from the former can easily be used with the latter. More common than forced induction upgrades are the use of bolt-on aftermarket parts such as intakes and exhausts. Using only the bolt-ons, around 155 whp is possible.

With certain SR20DET engine swaps, high levels of around 400 whp are possible. The newer Nissan SR engines can also be swapped into the G20. Factory turbocharged SR20VET Neo-VVL swaps are possible but rare, and output is difficult to estimate. The naturally aspirated SR20VE Neo-VVL can also be used in an engine swap which can (with bolt-ons) generate around 190 whp and can also be turbocharged. VQ35DE swaps are also theoretically possible.

Common manual transmission modifications include: Cryo treating, shot peening, transmission case welding, aftermarket LSD. aftermarket axles. and aftermarket clutches. Common automatic transmission modifications include: Built valve body, aftermarket torque converters. ATF coolers, and aftermarket TCU.

Stock manual transmissions are typically usable up to approximately 250 whp. while stock automatic transmissions can only handle about 155 whp. Most front wheel drive transmissions from other SR powered cars can be used with few modifications.

Common suspension modifications include lowering springs. shocks. coilovers. strut bars (front and rear), pillow-ball strut mount (front only for P11 with front and rear for P10), sway bar (rear), and traction bars.

  • 195/60/14 - 23.2 in. diameter (35-45 mm offset required) - ('91-'93 P10)
  • 195/65/14 - 24 in. diameter (35-45 mm offset required) - ('93.5-'96 P10)
  • 195/65/15 - 25 in. diameter (35-45 mm offset required) - ('99-'02 Standard)
  • 195/60/15 - 24.2 in. diameter (35-45 mm offset required) - ('99-'01 Touring)
  • 205/50/16 - 24.1 in. diameter (35-45 mm offset required) - ('02 Sport)

Common brake modifications can include calipers, pads. and steel brake lines. Many brake kits are available.

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