The 2008 Pontiac G6 offered two engines: a 2.4-liter Ecotec inline-4 and a 3.5-liter V6, with the engine choice tied to the trim level.
Across its lineup, the G6 came in base and GT trims, with the four-cylinder providing better fuel economy and the V6 delivering more power. Transmission options varied by engine, including a manual and an automatic depending on configuration.
Engine options
The following are the two engines that powered the 2008 G6, along with typical outputs and gearbox pairings.
2.4-liter Ecotec inline-4
Configuration: a 2.4 L four-cylinder from GM's Ecotec family. Output: roughly 164 to 167 horsepower and about 158 to 165 lb-ft of torque, depending on emission controls and calibration for the model year. Transmission options generally included a five-speed manual or a four-speed automatic; front-wheel drive was standard.
3.5-liter V6
Configuration: a 3.5 L V6 engine. Output: typically around 219 to 224 horsepower and about 217 to 223 lb-ft of torque. Transmission: generally a four-speed automatic; front-wheel drive. This engine was the higher-performance option found on GT trims and offered stronger acceleration than the four-cylinder.
Summary
In summary, the 2008 Pontiac G6 offered two engine choices — a 2.4-liter Ecotec inline-4 and a 3.5-liter V6 — with the V6 providing more power at the expense of lower fuel economy. Always check the specific vehicle’s VIN plate or window sticker for exact engine and options.