Honda G25a engine

The 2.5-liter Honda G25A engine was produced at the Japanese plant from 1989 to 1998 and installed in large models such as Inspire, Rafaga, Ascot, Vigor, and Saber. A well-known legend claims that this engine was created based on the power unit of a Formula 1 car. The G series also includes the G20A engine.

Technical data of Honda G25A 2.5 liter engine.

Exact capacity2451 cm³
Power systeminjector
Engine power180 - 190 HP
Torque225 - 235 nm
Engine blockaluminum R5
Block headaluminum 20v
Cylinder diameter85 mm
Piston stroke.86.4 mm
Compression ratio9.0 - 10
Engine featuresSOHC
Hydraulic compensator. there is no
Timing drivebelt
Timing phase adjusterthere is no
Turbochargingthere is no
What oils to use4.3 liters 5W-30
Fuel type92
Environmental classEURO 1/2
Approximate life expectancy350 000 HP

Fuel consumption Honda G25a engine

Using the example of the 1996 Honda Inspire with an automatic gearbox:
City12.6 litry
Route7.8 litry
Mixed9.7 litry

Engine Overview and Common Failures

The weight of the G25A engine according to the catalog is 170 kg. The engine number G25A is located at the junction of the block and gearbox. There are no questions about the reliability of the engine, but there are problems with service and spare parts. The most common issue for owners is frequent oil leaks from gaskets and seals. The timing belt lasts around 100,000 km, and in case of a valve failure, it bends in 100% of cases. The reason for fluctuating engine rpm is usually due to throttle or ECU contamination. There are no hydraulic compensators, and valve clearances need to be adjusted every 40,000 km.

Engine Honda G25a

TL 1 (UA)1995 - 1998
Ascot 2 (CE)1993 - 1997
Rafaga 1 (CE)1993 - 1997
Inspire 1 (CC)1989 - 1995
Inspire 2 (UA)1995 - 1998
Saber 1 (UA)1995 - 1998
Vigor 3 (CB)1989 - 1995

Engines from the same line as Honda G25a engine

See Also

Honda C30a Engine

The 3.0-liter 24-valve Honda C30A engine was produced in Japan from 1990 to 2005 and was only installed in the sporty Honda NSX model, including under the Acura brand. There were two versions of this engine: 274 horsepower for the manual version and 256 horsepower for the automatic version. The C series also includes the following engines: C27A, C32A, C32B, and C35A.

Honda J35a engine

The 3.5-liter V6 engine Honda J35A was produced at the factory in the USA from 1998 to 2012 and installed in many large models of the company, including Acura cars. It was this version of the engine that first received the VCM cylinder deactivation system. The J series also includes the following engines: J25A, J30A, J32A, and J37A.

Honda L15b Engine

The 1.5-liter petrol engine Honda L15B has been produced at Japanese plants since 2013 and is installed in several modern models of the company, such as the Fit, City, Civic, and Accord. This engine comes in two versions: naturally aspirated with fuel injection and turbocharged with direct injection. The L-series also includes the engines: L13A, L13B, and L15A.

Honda R20a engine

The 2.0-liter gasoline engine Honda R20A is produced by the Japanese corporation since 2006 and installed in many popular models of the company, such as Civic, Accord or CR-V crossover. This engine is available in several variants that differ slightly in size. In the R-series engine lineup, there is also the R18A engine.

BMW M57 engine

6-cylinder BMW M57 diesel engines with a capacity of 2.5 and 3.0 liters were produced from 1998 to 2012 and were practically installed in all major models of the company at that time. There are three generations of these power units, commonly referred to as M57, M57N, and M57N2. The R6 line also includes engines: M21, M51, N57, and B57.

Chevrolet Z20s engine

The 2.0-liter engine Chevrolet Z20S or Z20DMH or LLW was produced from 2006 to 2012 and installed in many popular models of the company, such as Captiva, Epica, or Cruze. This power unit is actually a diesel engine from VM Motori RA 420 SOHC 16V. The Z series also includes engines: Z20S1, Z20D1, and Z22D1.