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← Lambretta
Scooter · 1956

LD 150 series 2

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MotoLibrary Score
35 /100 Commuter
Power/Weight
0.07 hp/kg
Top Speed
79 km/h
Engine
148 ccm

1956 Lambretta LD 150 series 2 Technical Analysis & Specification Breakdown

Built around Lambretta's scooter motorcycle platform, the 1956 Lambretta LD 150 series 2 pairs a 148 cc (9 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 6.5 HP (4.7 kW) at 4,750 rpm, transferring power to the rear wheel through a 3-speed gearbox. With a specific output of 43.9 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 LD 150 series 2 measures 88 kg (194 lbs) dry, translating to a power-to-weight ratio of 0.07 HP/kg (13.54 kg per horsepower).

Within MotoLibrary's Lambretta archive, this model family spans 4 indexed model years from 1954 to 1957, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.

Specific Output
43.9 HP/L
Power-to-Weight
0.07 HP/kg (13.54 kg/HP)
Engine
Displacement 148.0 ccm (9.03 cubic inches)
Engine Type Single cylinder, two-stroke
Engine Details Single cylinder, two-stroke
Power 6.5 HP (4.7 kW)) @ 4750 RPM
Compression 6.5:1
Bore x Stroke 57.0 x 58.0 mm (2.2 x 2.3 inches)
Fuel System Carburettor. DellÓrto
Ignition Contact breaker and points
Cooling Air
Transmission
Gearbox 3-speed
Clutch 3 speed- hand changed
Performance
Top Speed 78.9 km/h (49.0 mph)
Chassis
Frame Type Tubular steel
Wheels & Brakes
Front Tyre 4-8
Rear Tyre 4-8
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
Dimensions & Weight
Dry Weight 88.0 kg (194.0 pounds)
Power/Weight 0.0739 HP/kg
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Beginner
A2 license compatible, manageable power.
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City & Commuting
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Handling
Very lightweight — easy to handle
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