Sports 2-seater, sports 2+2 seater.
2+2 BN4 only, until 1958; two-seater BN6 joins range March '58. Wire wheels and overdrive are desirable extras. Early (1956-7) BN4 cars with 102bhp engines are slower and less accelerative than the 'fours'. From late '57 there's a six-port head and more power.