The 2013 Infiniti G37 Coupe and Convertible ride on some of the same underpinnings as the G Sedan models--as well as the shorter Nissan 370Z. They're a few inches shorter than the Sedans, and that affects the way they handle. Overall, these models approach the balanced brilliance of the BMW 3-Series, and driving enthusiasts may actually prefer their somewhat sharper edgier feel behind the wheel.
In either of these models, a 3.7-liter V-6 engine makes 330 horsepower, and winds up to a 7500-rpm redline. With an aggressive throttle calibration as well as torque and horsepower curves that encourage you to rev it, this engine has infectious enthusiasm. But the down side is that it gets a little coarse in those upper ranges.
You can't go wrong with either of the transmission choices in the G37 Coupe or Convertible. We'd be satisfied with either the six-speed manual or the seven-speed automatic, though the throttle-blipping, paddle-shifted automatic seems a more natural fit for this Infiniti's mission. Expect to get to 60 mph in only about 5.5 seconds with the Coupe—and thanks to the quick-reacting transmissions, it often feels even quicker.
Confident rear-drive handling is highlighted by very good steering in the Coupe—though some of us have thought that it's a touch less communicative than that in the G Sedan. The ride is well damped, and we recommend the standard setup if your daily drive involves choppy pavement surfaces; yes, technically the Sport package gets the most out of its handling potential, but this firmer calibration and the 19-inch alloys bring out choppiness and cab be to the detriment of enjoyment.
All-wheel drive was a rarity in this class when it was first introduced in the G Coupe, but it's increasingly becoming the norm in the luxury set—even among two-doors. The AWD model tilizes Infiniti's ATESSA E-TS all-wheel-drive system found on other Infiniti models. It's an excellent system that's proactive and helps maximize stability when cornering; with its low-profile tires, don't expect it to be the kind you'd power through deep snow, but it should add some all-weather confidence.
For 2013, Infiniti has introduced a new IPL G Convertible, which joins the IPL G Coupe in offering a 343-horsepower version of the V-6, plus an IPL-tuned exhaust and suspension, unique front fascia and side sills, special IPL sport seats with cooling, and seven-spoke Graphite-finish alloy wheels. Enthusiasts who like what they see in the two-door G models should head right to these IPL cars, as they heighten the performance—albeit with more harshness.