[5] The published performance figures for the Mark VII were based on the standard 8:1 compression ratio, but as this was unsuitable for the UK market's low-octane Pool petrol, a 7:1 engine was optional.

[6] British motoring magazines tested the car's performance with the higher compression ratio, using the Ostend to Brussels autoroute in Belgium, where 80 octane fuel was available.

Although the engine continued with the same capacity and 8:1 compression ratio, the introduction of new high-lift cams increased the amount of power to 190 bhp (141.7 kW), giving the car a claimed top speed of 104 mph (167 km/h).

[7] Distinguishing the Mark VII M from its predecessor, circular grilles over the horns were installed below the headlights in place of the former integrated auxiliary lamps, which were moved slightly further apart up-rated and mounted on the bumper.

[11] Factory-entered Mark VIIs won the Daily Express International Trophy Production Touring Car race at Silverstone five years running, and twice took the top three places.

In January 1956 a Mark VII M driven by Ronnie Adams, Frank Biggar, and Derek Johnstone won the Monte Carlo Rally.

[12] In August 1956, at Road America, in Elkhart Lake, Wisconsin, Paul Goldsmith's Mark VII averaged 59.2 mph to win a 100-mile NASCAR Grand National race for cars up to 3500 cc.