Spied: 2007 Porsche 911 GT3
415 horses--without a turbo
By Editors of Motor Trend
Photography by the Manufacturer
Porsche has introduced its most powerful naturally aspirated 911 ever, the 415-horse 2007 GT3. Its 3.6-liter flat-six revs to 8400 rpm, 200 more than the previous GT3, with the peak horsepower coming in at 7600 rpm. It also features an active suspension setup for the track and a mechanical limited-slip differential.
The engine's throttle valve has been enlarged from 76 to 82 mm; there are optimized cylinder heads and a low-backpressure exhaust system. The car's six-speed manual has been revised, with lower gear ratios for second through sixth, and shorter throws. A new change-up display illuminates the tach before the driver reaches the relevant engine speed for optimal shift timing.
All this adds up to a 115.3-horse/liter specific output, which Porsche claims is the world's best for a naturally aspirated engine, and a claimed 0-to-60-mph time of 4.1 seconds. Zip to 100 mph takes 8.7 seconds, and the GT3's top test-track speed is 193 mph. Running on 19-inch wheels and tires, the GT3 has a new electronic traction-control system handed down from the Carrera GT.
On Sale In The U.S.: August
Price: $106,000