The 16 was very aerodynamically efficient .
Thanks to Costin 's bodywork , the high speed Reims - Gueux circuit did not favour the 16 's rather under - powered 2 - litre engine ; Hill 's car overheated on lap 19 .
Although the 16 was very aerodynamically efficient , thanks to Costin 's bodywork , the high speed Reims - Gueux circuit did not favour the 16 's rather under - powered 2 - litre engine ; Hill 's car overheated on lap 19 .