Pontiac G4 Overview: Specs, Generations, and Which Version to Buy
Pontiac G4 specs at a glance: a front-wheel-drive coupe built from 2005 to 2010 with 148–171 hp across six modifications. A guide to its single generation and the versions worth buying.
The Pontiac G4 is a front-wheel-drive coupe produced from 2005 to 2010, offered with engines from 148 to 171 hp. If you are comparing Pontiac G4 specs, the picture is simple: one generation, six modifications, a choice of automatic or manual gearbox, and FWD only. It suits drivers who want a straightforward compact coupe with an uncomplicated model range.
Pontiac G4 generations
1 generation (2005–2010)
The first and only generation of the Pontiac G4 was built from 2005 to 2010 exclusively as a coupe. Power output across the lineup ranges from 148 to 171 hp, and all six modifications drive the front wheels through either an automatic or a manual gearbox. The 2.2 AT (155 hp), with a 2189 cc engine, is the mass-market version of the range, while the 2.4 AT tops the lineup with 171 hp from a 2376 cc engine. Both of those notable versions were available throughout the entire 2005–2010 production run, so the choice between them comes down to power rather than model year.
Which Pontiac G4 to buy
- 2.2 AT (155 hp) (1 generation): the mass-market version of the range, pairing a 2189 cc engine with 155 hp, an automatic gearbox, and FWD — the configuration most buyers chose.
- 2.4 AT (1 generation): the most powerful Pontiac G4 at 171 hp from a 2376 cc engine, with the same automatic gearbox and front-wheel drive as the rest of the lineup.
Buying used is simplified by the single-generation lineup: every Pontiac G4 dates from 2005–2010 and shares the same coupe body and FWD layout, so there are no cross-generation differences to untangle — you are comparing engines and gearboxes, not platforms. With only six modifications in total, verifying exactly which version a given car is takes little effort.
Summary
The Pontiac G4 lineup is compact: one generation (2005–2010), one body style, six modifications, and a 148–171 hp spread. The 2.2 AT (155 hp) represents the mainstream choice, and the 2.4 AT with 171 hp is the strongest version. Neither version is dominated on the available numbers — the 2.4 AT simply offers 16 hp more than the 2.2 AT — so the decision rests on how much power you want in the same 2005–2010 coupe package.