2009 Infiniti G37 Sport Sedan

BY ERIK JOHNSON
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Redesigned for 2007, the second-generation Infiniti G35 sedan was good. Really good. Good enough to get all up in the faces of the competition and fall only to the benchmark BMW 3-series in its last comparison test. Good enough to have been invited to join us for a 40,000-mile fling. Good enough, in fact, to have secured itself a place on our 2007 10Best Cars list. But now it’s dead. And we don’t care.



We don’t mourn too deeply, you see, because the G35 has been replaced for 2009 by the G37. It’s still a second-gen G sedan, of course, but one that has been revised in several major areas.



Brains and Brawn: More MPG and More HP

Under the hood, the 306-hp, 3.5-liter V-6 has been kicked to the curb in favor of the 3.7-liter unit from the G37 coupe. The move adds 22 horsepower and variable valve timing to the sedan’s arsenal, with output now standing at 328 galloping ponies. Torque rises by just one, to 269 pound-feet, but the smooth-spinning six serves up adequate grunt no matter where the tach needle is pointing.



Fuel economy is unchanged for the manual-transmission model, but the rest of the lineup—which now uses a seven-speed automatic in place of the old five-speed—sees gains of 1 mpg in the city and 2 on the highway to 18/26 for rear-wheel-drive cars and 18/25 for the all-wheel-drive G37x. We recorded our observed fuel economy, but then either a staffer took the logbook home for bathroom reading or a sticky-fingered Infiniti PR rep snatched it up in the middle of the night, because it’s gone now.



Curiously, the additional power didn’t do a lot for the G37 at the test track, where we logged a 0-to-60-mph time of 5.2 seconds and a quarter-mile run of 13.8 seconds at 104 mph. Although quick, those digits lag 0.1 second each behind the best runs posted by its 3.5-liter predecessor (5.1 seconds and 13.7 at 104 mph). Admittedly, the results of various G35 Sports ranged as high as 5.5 seconds to 60 and 14.1 seconds through the quarter, and our G37 was a nearly factory-fresh car with a green motor, so there’s a chance the latest G could improve its results. Curb weight could also be a bit of a factor, as the G37 rang in at 3703 pounds, 120 pounds more than the slimmest G35 Sport we had previously weighed.

Maybe it didn’t shine on the test track, but the G37 sedan does burn brightly in the refinement department, an area where the G35 fell decidedly short. Infiniti quelled the G’s buzzy engine and quivering shifter somewhat last year, but things are even better now, with the only hint of engine harshness at the lofty tiptop of the tach—redline is still 7600 rpm—rather than throughout.