The Crossley 20 hp was introduced in 1909. It became the 20/25 in 1912 and continued until it was replaced by the 25/30 in early 1919.

The number made for civilian use is not known but is estimated at 2100. At least 6000, possibly as many as 10,000, were made for military use. Before about 1919 chassis numbers were not segregated by model type and are in the range up to 12000. Many ex-RFC tenders were later re-bodied as cars or buses and possibly given new civilian chassis numbers.

The engines were numbered and date stamped and engine numbers and chassis numbers were close but not usually identical. As an example, engine number 11152 is stamped July 1918.

Crossley 20/25 engine


Crossley 1910 20hp car

A 1910 20hp with front wheel brakes. (Unusually we know the chassis number for this car, 710, with engine number 709.) (Photo - Donald Chadwick)

Crossley 20hp with Mann Egerton body

20hp with Mann Egerton Three-quarter Landaulette body
£640 (1912)

Crossley 20/25 landaulette

20hp Crossley bodied Landaulette photographed outside the factory in 1917

Crossley 20/25 tourer

20/25 5 seat tourer

Crossley 20/25 ambulance

20/25 Tender with ambulance body

Crossley 20/25 tender

20/25 Tender with light lorry body

Crossley 20/25 tender

20/25 Staff Car. The wheel discs were frequently fitted to help keep the wheels clean.

Many cars were supplied in chassis only form to independent coach builders. The above are a selection of the body styles produced by Crossley and other coach builders

The prices quoted are for the home market and come from contemporary advertisements.


capacity 4531cc
cylinders 4 pair cast. Fixed cylinder head.
bore 4 inches (100mm)
stroke 5 1/2 inches(140mm)
compression ratio 4 to 1
RAC Horse Power 25.6
carburettor 40 mm Smiths
valves side
lubrication pressure to 5 main bearings
ignition Magneto
max power 40 bhp at 1500rpm
fuel consumption (typical) 13-15 miles per gallon
fuel tank capacity 18 imperial gallons (20/25 staff car)
max speed (approx) 55 miles per hour
Gears 4 speed right hand change
Clutch cone
Drive Shaft Torque tube
Rear axle fully floating axles
straight cut bevel gears
ratio of 4:1 and others