Historic Formula 1 cars warming up their engines (mostly straight 6). Great sound!
Filmed at the Historic Grand Prix 2013 event at Zandvoort. Race won by No 1 Lotus 16.
As 2nd came No 20, also a Lotus 16 and third No 2 the Lister Jaguar Monzanapolis.

The cars in the following order:
No. 17 Gordini T1631 from 1956
No. 19 Cooper Bristol MK II 3/53 from 1953
No. 33 Cooper Bristol MK II 6/53 from 1953
No. 20 Lotus 16 16/4/364 from 1959
No. 46 Cooper T45 from 1958
No. 22 Maserati 250F CM7 from 1958
No. 02 Lister Jaguar Monzanapolis from 1958