Most importantly the DB9 2009MY was fitted with a revised version of the 5.9 litre V12 engine tuned to deliver improved power and torque. Peak power of 470 bhp (+20bhp) was now reached at 6,000rpm, resulting in a power to weight ratio of 267bhp per tonne (+11bhp per tonne over the original DB9). Peak torque of 600 Nm was delivered at 5,000rpm. Accordingly, the quoted top speed went up to 190mph and the all important 0-60mph time improved by 0.3 seconds (to 4.6 seconds) for the Touchtronic 2 transmission, which benefited from a new valve box and integrated transmission controls to achieve quicker gear shifts. The very rare manual DB9 was also quicker to 60mph by 0.1 seconds, down to 4.6 seconds.
The 2009MY DB9 also incorporated a series of chassis developments for both the Coupe and Volante derivates. Bilstein dampers were introduced in addition to revised upper suspension arms and retuned suspension bushes to deliver improved ride quality. The highly desirable Premium Sports Pack was made available as an option early in 2010 which featured the Adaptive Damping System from the DBS. Deliveries of the revised DB9 coupe began during the second quarter of 2008 with a starting price in the UK of £113,950 with rarely specified manual transmission and £116,950 for the Touchtronic 2.