Key facts

1949 Austin A90 Atlantic information summary

What body style?
convertible/cabriolet with 2+2 seats
How long?
4496 mm
How heavy?
1359 kg
What size engine?
2.7 litre, 2660 cm3
How many cylinders?
4, Straight
How much power?
89 PS / 88 bhp / 66 kW @ 4000 rpm
How much torque?
190 Nm / 140 / 19.4 kgm @ 2500 rpm
How quick?
0-60 mph: 22.2 s
How fast?
135 km/h, 84 mph


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Austin logo

British Leyland (Austin-Morris) Limited

1949 Austin A90 Atlantic technical specifications


The Austin A90 Atlantic is a convertible/cabriolet with 4 doors and a front mounted powerplant which delivers its power to the rear wheels.
Power is produced by an overhead valve, 2.7 litre naturally aspirated 4 cylinder motor, with 2 valves per cylinder that develops power and torque figures of 88 bhp (89 PS/66 kW) at 4000 rpm and 190 N·m (140 lb·ft/19.4 kgm) at 2500 rpm respectively.
Power is supplied to the wheels through a 4 speed manual gearbox.
With a stated kerb weight of 1359 kg, the Austin A90 Atlantic manages to cover the 0-60 mph dash in 22.2 seconds and the quarter mile from rest in 20.9 seconds.
The Austin A90 Atlantic is claimed to achieve a top speed of 135 km/h or 84 mph.
1949 Austin A90 Atlantic data
1949 Austin A90 Atlantic data
Body type2+2 seater convertible/cabriolet
Number of doors4
dimensions & weights
Wheelbase 2438 96
Track/tread (front) 1359 53.5
Track/tread (rear) 1410 55.5
Length 4496 177
Width 1778 70
Height 1549 61
Ground clearance
length:wheelbase ratio 1.84
Kerb weight 1359 kg 2996 lb
Weight distribution 52.3 % front
fuel tank capacity
Drag coefficient
Frontal area
engine type naturally aspirated petrol
Engine manufacturer Austin
Engine code
Cylinders Straight 4
Capacity 2.7 litre
2660 cc
(162.323 cu in)
Bore × Stroke 87.3 × 111.1 mm
3.44 × 4.37 in
Bore/stroke ratio 0.79
overhead valve (OHV)
2 valves per cylinder
8 valves in total
maximum power output 89 PS (88 bhp) (66 kW)
at 4000 rpm
Specific output 33.1 bhp/litre
0.54 bhp/cu in
maximum torque 190 Nm (140 ft·lb) (19.4 kgm)
at 2500 rpm
Specific torque 71.43 Nm/litre
0.86 ft·lb/cu3
Engine construction
compression ratio 7.5:1
Fuel system 2 SU carburettors
bmep (brake mean effective pressure) 897.6 kPa (130.2 psi)
Maximum RPM
crankshaft bearings
Engine coolant Water
Unitary capacity 665 cc
Aspiration Normal
Compressor N/A
Intercooler None
Catalytic converter N
Acceleration 0-80km/h (50mph) 14.9 s
Acceleration 0-60mph 22.2 s
Acceleration 0-100km/h
Acceleration 0-160km/h (100mph) -1.00 s
Standing quarter-mile 20.9 s
Standing kilometre
Maximum speed 135 km/h (84 mph)
Power-to-weight ratio 65.65 PS/g
48.29 kW/g
64.75 bhp/ton
0.03 bhp/lb
Weight-to-power ratio 20.71 kg/kW
34.59 lb/bhp
fuel consumption
Fuel consumption
universal consumption (calculated from the above)
litres per 100km
km per litre
Carbon dioxide emissions
Carfolio Calculated CO2 ?
VED band (UK)
CO2 Effizienz (DE)
Engine position front
Engine layout longitudinal
Drive wheels rear wheel drive  
Torque split N/A
turns lock-to-lock
Turning circle
Front suspension I.CS.
Rear suspension LA.SE.
Wheel size front
Wheel size rear
Tyres front 5.50 x 16
Tyres rear 5.50 x 16
Brakes F/R Dr/Dr
Front brake diameter
Rear brake diameter
Gearbox 4 speed manual
Top gear ratio 1
Final drive ratio 3.70
general ID50248
Production total
Model code
Model family
RAC rating 18.9
Insurance classification No information available
Tax band No information available
1949 Austin A90 Atlantic added before December 1995.
Last modified 2013-02-28.

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1949 Austin A90 Atlantic

World Car Specifications