Blue Label specification included a 5 jet Smith-Bentley carburetor and a 4.3:1 compression ratio resulting in 70 bhp at 3,500 RPM which delivered an 80 mph top speed.
Red Label Speed models came with twin SU carburetors and a 5.3:1 compression ratio producing 85 bhp and a 90+ mph top speed.
Green Label 100 mph Supersports models - of which only 18 were made - were fitted with short chassis and a lightweight body which was also a key factor in these sought after models reaching the "ton". The radiator was distinctively tapered at the base. The high state of tune of these models with the compression ratio being 6.3:1, together in some cases with fitment of a racing heavy duty crankshaft, was reflected in the standard 5 year warranty being adjusted to 12 months.