joe603 wrote:The newer Altima and the 03-06 G35 do look similar...but they are about the same as the mustang vs. focus.
The Altima does have the same engine (if it's the 3.5), but it's FWD with a CVT transmission. The 350Z and the G35 are cousins...both with 3.5 RWD, with the 350z missing the backseat and getting more performance orientated parts (intake, exhaust, suspension).
There's a 6mt version of the 3.5 too, Joe.
OP,
The similarities between the Altima Coupe and G35 Coupe lie exclusively with the body lines. The chassis are very different. The drivetrain is very different (with the exception of the VQ35DE engine, which isn't the same between the two anyway).
The G35 and 350Z share the same drivetrain, the same chassis (G35s is elongated to accomodate the rear seats), and quite a few other components. Your co-worker needs some schooling before making a claim like that.