Ailsa Craig Engines

Ailsa Craig RF2The Ailsa Craig Engine Company was a manufacturer of marine and specialist, made-to-order engines between 1891 and 1972.

Named after the Scottish island of Ailsa Craig, the company began as a bicycle manufacturer in Glasgow in 1891, moving to Putney (and later Chiswick) in London where they began building motor vehicles.

Ailsa Craig produced the world’s first V12 engine in 1904, worked for the Ministry of Munitions and the Admiralty during the First World War and in 1926 was granted a Royal Appointment.

There was further war commitment in 1939 from an additional factory site in Twickenham until after the war when the factory moved to Ashford where it continued to produce high quality diesel engines until sold to Warsop’s Fram Group in 1964. The company was closed down in 1972.

EngineDisplacementPower outputBore & StrokeWeight
Single-cylinder
RF10.80 l
803 cc
15 HP @ 1500 RPM4 1/8 X 5 1/2310 kg
RF1M0.80 l
803 cc
10 HP @ 1200 RPM4 1/8 X 5 1/2330 kg
RFS10.80 l
803 cc
10 HP @ 1200 RPM4 1/8 X 5 1/2310 kg
Two-cylinders
RF21.6 l
1606 cc
30 HP @ 1500 RPM4 1/8 X 5 1/2410 kg
RF2M1.6 l
1606 cc
20 HP @ 1200 RPM4 1/8 X 5 1/2430 kg
RFS21.6 l
1606 cc
20 HP @ 1200 RPM4 1/8 X 5 1/2410 kg
Straight-3
RAS32.4 l
2410 cc
45 HP @ 1500 RPM4 1/8 X 5 1/2
RF32.4 l
2410 cc
45 HP @ 1500 RPM4 1/8 X 5 1/2500 kg
RF3M2.4 l
2410 cc
30 HP @ 1200 RPM4 1/8 X 5 1/2550 kg
RFS32.4 l
2410 cc
30 HP @ 1200 RPM4 1/8 X 5 1/2500 kg
RKS32.4 l
2410 cc
35 HP @ 1500 RPM4 1/8 X 5 1/2
Straight-4
RAS43.2 l
3213 cc
60 HP @ 1500 RPM4 1/8 X 5 1/2
RF43.2 l
3213 cc
60 HP @ 1500 RPM4 1/8 X 5 1/2650 kg
RF4M3.2 l
3213 cc
40 HP @ 1200 RPM4 1/8 X 5 1/2700 kg
RFS43.2 l
3213 cc
40 HP @ 1200 RPM4 1/8 X 5 1/2650 kg
RKS43.2 l
3213 cc
46 HP @ 1500 RPM4 1/8 X 5 1/2
Straight-6
RAS64.8 l
4818 cc
90 HP @ 1500 RPM4 1/8 X 5 1/2
RF64.8 l
4818 cc
90 HP @ 1500 RPM4 1/8 X 5 1/2780 kg
RF6M4.8 l
4818 cc
60 HP @ 1200 RPM4 1/8 X 5 1/2950 kg
RFS64.8 l
4818 cc
60 HP @ 1200 RPM4 1/8 X 5 1/2780 kg
RKS64.8 l
4818 cc
70 HP @ 1500 RPM4 1/8 X 5 1/2
Straight-8
RF86.4 l
6424 cc
120 HP @ 1500 RPM4 1/8 X 5 1/2900 kg
RF8M6.4 l
6424 cc
80 HP @ 1200 RPM4 1/8 X 5 1/21300 kg
RFS86.4 l
6424 cc
80 HP @ 1200 RPM4 1/8 X 5 1/2900 kg
V12
RF129.6 l
9636 cc
180 HP @ 1500 RPM4 1/8 X 5 1/2980 kg
RF12M9.6 l
9636 cc
120 HP @ 1200 RPM4 1/8 X 5 1/21450 kg
RFS129.6 l
9636 cc
120 HP @ 1200 RPM4 1/8 X 5 1/2980 kg