2009 Bugatti Veyron 16.4: No significant changes.
2009 Bugatti Veyron 16.4 Grand Sport : The new Grand Sport is an open-top or targa version of the Bugatti Veyron 16.4. It’s powered by the same midmounted 8.0-liter quad-turbocharged W16 engine used in the coupe. It’s good for 1,001 hp and an unbelievable 922 pound-feet of torque. The all-wheel-drive supercar also packs a beefed-up seven-speed version of its excellent dual-clutch gearbox.
Source: Inside Line