The original Infiniti G35 was introduced for 2003, and was produced in sedan form until 2006 and as a coupe until 2007. Originally, the sedan was available in one trim level until the all-wheel-drive model arrived for ’04. The coupe could be had in base or Sport trim. The latter included a firmer suspension, a limited-slip differential and 19-inch alloy wheels.
Both sedan and coupe shared the same 3.5-liter V6, but the sedan originally made less power (260 hp with four doors, 280 with two doors). They were made even at 280 hp for 2005, and both models when equipped with the six-speed manual option got a boost to 298 hp. These horsepower numbers dropped to 293 and 275, respectively, for the ’07 coupe because of a change in SAE testing procedures — actual output did not, in fact, change.