Aston Martin DBR4, 1959Production Dates: October 1958 - June 1963Tadek Marek's new 3.7 litre, six-cylinder twin overhead camshaft, all alloy engine first ran in 1956 and was raced in the DBR2 in 1957.Work on the DB4 started in 1956, at the same time as the DB Mark III. The key people involved in the development of the DB4 were general manager John Wyer, chassis designer Harold Beach, and engine