Standard equipment on the DB5 included reclining seats, wool pile carpets, electric windows, twin fuel tanks, chrome wire wheels, oil cooler, magnesium-alloy body built to superleggera patent technique, full leather trim in the cabin and even a fire extinguisher. All models have two doors and are of a 2+2 configuration. The boot (trunk) lids differed slightly between the DB4 mark 5 and the DB5.
The principal differences between the DB4 Series V and the DB5 are the all-aluminium engine, enlarged from 3.7 L to 4.0 L; a new robust ZF five-speed transmission (except for some of the very first DB5s); and three SU carburettors.
This engine, producing 282 bhp (210 kW), which propelled the car to 145 mph (233 km/h), available on the Vantage (high powered) version of the DB4 since March 1962, became the standard Aston Martin power unit with the launch in September 1963 of the DB5.