The Aston Martin DB5 had a fairly short production run, from 1963 to 1965, with just 1,023 units produced. But to be fair, the DB4, the DB5 and the DB6 are all basically evolutions of the same idea. The DB4 was a radical departure from the DB Mark III it replaced, and the DBS that replaced the DB6 was a much larger and heavier vehicle than the previous DB cars. Although there were some styling changes in the evolution from DB4 to DB5, the big advantage of the new car was a bigger and more powerful engine, enlarged from 3.7 liters to 4.0 liters. The inline-six engine now produced 282 horsepower, a bump from the 240 of the DB4.