a 10-millimeter reduction in ride height from the 911 Turbo, the drag coefficient is slightly higher — vs. the Turbo's 0.33 — due to the fixed rear wing. Technical specifications Configuration: Water-cooled twin-turbocharged Porsche flat-six engine Valvetrain: DOHC 4 valves per cylinder Displacement: Bore × stroke: × Compression ratio: 9.4:1 Maximum power: at 5,700 rpm Specific power: Maximum torque: at 3,500 rpm Specific torque: Length: Width: Height: Wheelbase: Front track: Rear track: Curb weight: Drag coefficient: 0.34 Fuel capacity: Power-to-weight ratio: 248.3 W/kg (6.63 lb/hp) Top speed: 0–100 km/h (62 mph): 4.1 seconds–3.9 seconds 0–200 km/h (124 mph): 13.9 seconds–12.2 seconds 1/4 mile (402 m): 12.1 seconds 997 generation The 996 GT2 was superseded by the 997 GT2 in 2007 after a brief hiatus, with cars arriving at dealerships in November 2007 after an official launch at the 62nd Frankfurt Motor Show. The GT2's engine was based on the flat-6 engine as seen on the Turbo, but featured two variable geometry turbochargers. The engine generated a maximum power output of at 6,500 rpm and of torque at 2,200 rpm. The GT2 accelerated from 0 to in 3.6 seconds and on to in 10.6 seconds, and had a maximum top speed of . This made it the third Porsche production road car to exceed the barrier, with the exception of the 1998 911 GT1 (of which only 20 units were produced for street use, solely to satisfy ACO homologation requirements for racing). The American automotive magazine Motor Trend tested a 2008 Porsche 911 GT2 and achieved a acceleration time of 3.3 seconds, and a quarter mile time of 11.3 seconds at . The GT2 also recorded a braking distance from 60 to 0 mph of , and 1.10g of lateral grip. The appearance of the 997 GT2 once again differed from its sister car, the 997 Turbo. It had a revised front lip, a newly designed rear wing with two small air inlets on either side, and a revised rear bumper featuring titanium exhaust pipes and shark fin outlets. German Porsche test driver Walter Röhrl lapped the Nürburgring Nordschleife on a public day in 7 minutes, 32 seconds in the 997 GT2. A total of 194 units were sold in the United States and 19 units in Canada. Technical specifications Technical specifications of the standard 997 GT2: Configuration: Water-cooled twin-turbocharged Porsche flat-six engine Displacement: ; 4 valves per cylinder Bore ×