1958 Velocette Mac Technical Analysis & Specification Breakdown
At the heart of the 1958 Velocette Mac allround motorcycle, Velocette utilizes a 349 cc (21.3 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 18 HP (13.1 kW) at 5,500 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 51.6 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Mac measures 161 kg (355 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (8.94 kg per horsepower).
Within MotoLibrary's Velocette archive, this model family spans 26 indexed model years from 1934 to 1959, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
