With a 6.0-liter V-12 engine that produces 450-hp and a 6-speed automatic w/OD and auto-manual 6-speed manual w/OD6-speed w/OD transmissions, the 2008 Aston Martin DB9 has a fuel economy range of 10 – 11 MPG/City and 16 – 18 MPG/Highway. Aston Martin says the manual-shift DB9 can accelerate from zero to 60 mph in 4.7 seconds and has a top speed of 190mph.