A year after its debut as a sport coupe (taking over for the G35), the G37 receives a number of new features for 2009, including all-wheel drive and a new seven-speed automatic transmission. In addition, the G37 lineup now includes the G37 Sport Sedan, which replaces the G35 sedan and receives a boost in horsepower for '09. Infiniti also adds a new G37 Convertible to fill out the lineup.

The G37 Coupe serves as Infiniti's answer to such high-performance vehicles as the Audi TT roadster, the Jaguar XK, and the BMW 335i. It features a sleek, aerodynamic shape, a low stance, a swept-back roofline, and a sculpted hood that's deeply curved where it meets the front fenders. Available trims include the Base G37 Coupe, the G37 Coupe Journey, the G37 Coupe Sport 6MT, and the new G37x Coupe with all-wheel drive.

Power comes in the form of a 330-hp, 3.7-liter V6 engine with Variable Valve Event and Lift (VVEL) technology, which continually adjusts valve lift and timing to provide quicker response, better fuel economy, and lower emissions. The V6 engine manages 18/26 city/highway mpg.

In all trims except the G37 Sport 6MT, the V6 links to a new seven-speed automatic transmission with a Drive Sport (DS) mode and a driver-adaptive algorithm, which senses the driver's style and makes adjustments to the shifting patterns accordingly. For a sportier driving experience, the G37 Sport comes equipped with a close-ratio six-speed manual transmission with a short-throw shifter.

The new G37 Sport Sedan retains the same basic design and suspension of the previous year's G35, but now comes equipped with a more powerful 328-hp, 3.7-liter V6 engine. The engine also features VVEL technology, and produces 269 lb-ft of torque at 5,200 RPM, which drives the G37 from 0 to 60 in just 5 seconds. Like the G37 Coupe, the Sedan trims include the Base, Journey, Sport 6MT, and G37x AWD.

Key features for both the G37 Coupe and G37 Sedan trims include leather seats, power-adjustable front seats, Washi-finish interior aluminum trim, a leather-wrapped steering wheel and shift knob, and a six-speaker audio system with an MP3 input jack. All trims except the Base also include a 6-CD changer. Options such as a navigation system with a 7-inch color display, a rear-view monitor, and Bluetooth hands-free phone connectivity are available for all trims except the Base Coupe and Sedan.

In addition, Infiniti offers optional sport brakes for the G37 Sedan trims, with four-piston front and two-piston rear calipers, and large 14-inch front and 13.8-inch rear rotors. All G37 trims also receive new Scratch Shield paint with a self-healing clearcoat finish as a standard feature.

The all-new G37 Convertible, which Infiniti will introduce as a mid-year 2009 trim, will be the first open-air trim in the G lineup. Based on the G37 Coupe, the G37 Convertible will feature a three-piece automatic retracting hardtop and unique optional interior treatments. In addition, it will come equipped with audio and heating/cooling systems designed for open-air driving.