1955 Horex Regina 400 Technical Analysis & Specification Breakdown
At the heart of the 1955 Horex Regina 400 naked motorcycle, Horex utilizes a 400 cc (24.4 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 16.2 HP (11.8 kW) at 5,750 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 40.5 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 Regina 400 measures 150 kg (331 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (9.26 kg per horsepower). Rider ergonomics and chassis geometry center around a 760 mm (29.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops.
Within MotoLibrary's Horex archive, this model family spans 7 indexed model years from 1950 to 1958, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
40.5 HP/L
Power-to-Weight
0.11 HP/kg (9.26 kg/HP)
Standover Height
760 mm (29.9 in)
Engine
Displacement400.0 ccm (24.41 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power16.2 HP (11.8 kW)) @ 5750 RPM
Fuel SystemCarburettor
Fuel ControlOverhead Valves (OHV)
CoolingAir
Transmission
Final DriveChain (final drive)
Performance
Top Speed130.0 km/h (80.8 mph)
Chassis
Front SuspensionHydralic telescopic forks
Wheels & Brakes
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight150.0 kg (330.7 pounds)
Power/Weight0.1080 HP/kg
Seat Height760 mm (29.9 inches) If adjustable, lowest setting.
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
