Refined VI, with wish-bone ifs and hydraulic brakes. S1 has alloy nose-cone, cycle wings, normally Ford side-valve, some with 1098cc Coventry-Climax FWA ('Super Seven'), later S1s available with BMC A-series. S2 has simplified space-frame, revised rear axle location, grp nose. 105E engine option from '61, flared 'clamshell' wings soon after.
- 1172cc/948cc/997cc/1098cc (S4 SV/S4 OHV/S4 OC)
- Front engine, rear-wheel drive
- Production dates:
- 1957 to 1962
- Number produced:
- est 242/approx 1350 all S2