The

Toyota Motor Corporation is a Japanese multinational automotive manufacturer headquartered in Toyota City, Aichi, Japan. It was founded by Kiichiro Toyoda and incorporated on . Toyota is one of the largest automobile manufacturers in the world, producing about 10 ...

G-family engine is a family of straight-6 piston engines produced from 1979 to 2008. It is notable in that only a single displacement, , was produced in this series. Initially belt-driven OHC non-interference engines (except the

VVT-i VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing technology developed by Toyota. It was first introduced in 1995 with the '' 2JZ-GE'' engine found in the JZS155 Toyota Crown and Crown Majesta. The VVT- ...

version which is an interference engine),

multivalve In automotive engineering a multi-valve or multivalve engine is one where each cylinder has more than two valves. A multi-valve engine has better breathing and may be able to operate at higher revolutions per minute (RPM) than a two-valve engine ...

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

(except the 1G-EU SOHC 12 valve engine) and

variable valve timing In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with var ...

were added later during the production run. The 1G-GEU was Toyota's first mass produced four-valve twincam engine. A prototype version of the 1G-GEU called the LASREα–X, featuring

twin-turbo Twin-turbo (not to be confused with a twincharger setup, which is a combination of a supercharger and a turbocharger) refers to an engine in which two turbochargers work in tandem to compress the intake fuel/air mixture (or intake air, in the case ...

s, variable valve timing and intake as well as variable displacement, was fitted to the Toyota FX-1 show car at the 1983

Tokyo Motor Show The is a biennial auto show held in October–November at the Tokyo Big Sight, Tokyo, Japan for cars, motorcycles and commercial vehicles. Hosted by the Japan Automobile Manufacturers Association (JAMA), it is a recognized international show ...

. It showcased a number of technologies which were later to become commonplace. These engines were used as a lower-displacement alternative to the more upmarket M family and JZ family straight-sixes. For ten months (in 1967-1968), Toyota also offered Hino's GR100 engine as the "Toyota G" in the shortlived Briska light truck.

G (Hino GR100)

After Toyota's takeover of Hino Motors in 1967, the Briska one-tonne truck was sold with Toyota badging for ten months. The engine code was changed from Hino's "GR100" to "G" for these cars. The engine is a 1251 cc watercooled

OHV An overhead valve (OHV) engine, sometimes called a ''pushrod engine'', is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with earlier flathead engines, where the valves were located bel ...

inline-four with distant

Renault Groupe Renault ( , , , also known as the Renault Group in English; legally Renault S.A.) is a French multinational automobile manufacturer established in 1899. The company produces a range of cars and vans, and in the past has manufactured ...

origins and was originally developed by Hino for their Contessa passenger car. Bore and stroke are , maximum power at 5500 rpm. Hino's earlier models had a variety of power outputs ranging from 52 to 65 PS. Apart from its name, this engine is unrelated to the later series of Toyota G engines.

1G

Since just one displacement was offered, all G-family engines are marked 1G and share the same "

square In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90- degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length a ...

" bore and stroke. Applications: *

Toyota Soarer The is a Personal luxury car, personal luxury Grand tourer, GT coupé produced from 1981 to 2005 by Toyota and sold in Japan. It was available at both Japanese Toyota dealerships called ''Toyota Store'' and ''Toyopet Store'', and it debuted with ...

Toyota Celica Supra is a sports car and grand tourer manufactured by the Toyota Motor Corporation beginning in 1978. The name " supra" is derived from the Latin prefix, meaning "above", "to surpass" or "go beyond". The initial four generations of the Supra were p ...

Toyota Crown The is an automobile which has been produced by Toyota in Japan since 1955. It is primarily a line of mid-size luxury cars that is marketed as an upmarket offering in the Toyota lineup. Introduced in 1955 as the Toyopet Crown, it has served ...

Toyota Crown Comfort is a Japanese multinational automotive manufacturer headquartered in Toyota City, Aichi, Japan. It was founded by Kiichiro Toyoda and incorporated on . Toyota is one of the largest automobile manufacturers in the world, producing about 10 ...

/ Crown Sedan *

Toyota Cressida The is a compact, later mid-size sedan manufactured and marketed in Japan by Toyota between 1968 and 2004. Prior to 1972, the model was marketed as the Toyota Corona Mark II. In some export markets, Toyota marketed the vehicle as the Toyota Cres ...

Mark II Mark II or Mark 2 often refers to the second version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk." Mark II or Mark 2 may refer to: Military and weaponry * 16"/50 caliber Mark 2 gun ...

/ Cresta/ Chaser *

Toyota Altezza The is a compact executive car sold by Lexus, a luxury division of Toyota since 1999. The IS was originally sold under the nameplate in Japan from 1998 (the word ''Altezza'' is Italian for 'height' or 'highness'). The IS was introduced as an e ...

Lexus IS200 The is a compact executive car sold by Lexus, a luxury division of Toyota since 1999. The IS was originally sold under the nameplate in Japan from 1998 (the word ''Altezza'' is Italian for 'height' or 'highness'). The IS was introduced as an e ...

1G-E

The export-spec two-valve 1G-E had no emissions controls and were used in commercial vehicles and for a few export markets, mostly southeast Asia. Typical specifications: * at 5000 rpm, torque at 4000 rpm (Mark II, 1986, Indonesia) * at 5200 rpm, JDM Crown GS130/131/136V/130G

1G-EU

The Japan-spec 1G-EU was produced from 1979 through 1988. This and the 1G-E are the only two-valve SOHC members of the family. Output was at 5400 rpm and at 4400 rpm.

1G-FE

The

1G-FE uses a narrow valve angle and other fuel economy optimizations. It was introduced in 1988, it features a cast iron block with aluminum cylinder head. Output was at 5,600 rpm and at 4,400 rpm. In 1998

was added, which bumped output to at 6,200 rpm and at 4,400 rpm for the Altezza/IS 200. Production of this engine family ceased in 2008 after the discontinuation of the Crown Sedan mild hybrid. Applications: *

/ Lexus IS 200 *

* Aug 2001–Aug 2008

Toyota Crown Sedan The and the long-wheelbase Toyota Crown Comfort are a line of mid-size sedans produced by Toyota between 1995 and 2018. A platform derivative of the Toyota Mark II (X80), the Comfort was aimed at fleet buyers with a primary focus on taxicab ...

GBS12, GXS12 *

Toyota Chaser The Toyota Chaser is a mid-size car produced by Toyota in Japan. Most Chasers are four-door sedans and hardtop sedans; a two-door hardtop coupé was available on the first generation only. It was introduced on the 1976 Toyota Corona Mark II pla ...

/ Cresta *

Toyota Mark II Blit The is a mid-size station wagon manufactured by the Japanese automaker Toyota. It is the replacement of the Mark II Qualis and shared a platform with the X110 series Mark II rear-wheel drive sedan, while the Mark II Qualis is a rebadged XV20 ...

Toyota Verossa The is a mid-size sedan produced by Toyota for the Japanese market, and was exclusive new to the ''Netz Store'' locations as the smaller companion sedan to the Aristo. The Verossa exceeded Japanese government dimension regulations concerning ...

Toyota Supra is a sports car and grand tourer manufactured by the Toyota Motor Corporation beginning in 1978. The name " supra" is derived from the Latin prefix, meaning "above", "to surpass" or "go beyond". The initial four generations of the Supra were ...

1G-GEU

The 24-valve DOHC 1G-GEU was intended for high performance and featured a

pent-roof combustion chamber In engine design, the penta engine (or penta ''head'') is an arrangement of the upper portion of the cylinder and valves that is common in engines using four valves per cylinder. Among the advantages is a faster burn time of the air-fuel mix. It ...

. Introduced in August 1982 and produced through 1986, mostly for the Japanese market, output was at 6,200 rpm and at 5,600 rpm. This was Toyota's first multi-valve twincam engine to make it to the market, and won the "JSME Medal for New Technology" (Japan Society of Mechanical Engineers) in 1982. To minimize the downsides of a multi-valve setup, the 1G-GEU was also equipped with

T-VIS Toyota Variable Induction System, or T-VIS, is a variable intake system designed by Toyota to improve the low-end performance of multi-valve engines. T-VIS is intended to improve the low-end torque of high-performance, four-stroke internal combusti ...

(Toyota Variable Induction System), increasing low to mid-engine speed torque. Like all following twin cam Toyotas, it used a timing belt rather than chain, for less noise and lower maintenance requirements. In August 1983, the fuel injection system was changed to EFI-D, which measures the pressure in the intake manifold to determine the proper air-fuel mixture.''All About the Toyota Twin Cam''
p. 20 Applications: * Aug 1982–1985 Celica XX GA61 * Aug 1982–1992

/ Cresta * Aug 1983–1995

* Feb 1983–1991

1G-GE

The 1G-GE replaced the 1G-GEU in 1988. It was detuned from to and served the same cars as 1G-GEU did. Torque was at 5600 rpm. It was produced for the Supra GA70 until 1993.

1G-GTE

The 24-valve DOHC 1G-GTE added two CT-12

turbocharger In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

s to the versatile motor. There were 3 generations of this engine both air-to-air and air-to-water intercoolers were used, pushing output from at 6200 rpm and at 3800 rpm using the air-to-air over the air-to-water. This was the most powerful engine of the whole G family. In May 1991 it was replaced with the 280 PS 1JZ-GTE on most Toyota cars. Applications: * 1986–1992 Supra MK3 (GA70; JDM only) * 1986–1992

/ Chaser/ Cresta (GX71, GX81) * 1986–1991 Soarer (GZ20)

1G-GP/GPE

The 1G-GP and 1G-GPE was an LPG version of the 1G-GE engine. Output is at 5600 rpm and torque is at 2400 rpm. Applications: * Toyota Crown Sedan (GS130, GS151) * Toyota Crown Comfort/Sedan (GXS10)

1G-GZE

The 1G-GZE was a supercharged version produced from 1986 till 1992. Output is at 6000 rpm and at 3600 rpm. Like the turbo, it was a 24-valve DOHC engine but featured a distributorless ignition system ( DIS). The 1G-GZE was mated only with

automatic gearbox An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving ...

es. In August 1991 it was replaced with the 1JZ-GE on the Mark II/Chaser/Cresta, while serving on the Crown until 1992. Applications: *

GS120, GS121, GS131, GS130G (Station Wagon) * 1988–1990 Toyota Mark II/Chaser/Cresta GX81