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Technical Specifications for the
4A Roadster

Date of Manufacture---4A Sep. 1949 to Oct. 1950,

Serial No. location -- Brass plate under bonnet.

Engine
Firing order 1,3,4,2Four cylinder, 60 mm. by 95 mm. = 1,074 c.c.
                       :in 2.3622 X 3.7401 :cu in 65.54Single overhead camshaftRAC rated 9 hpCompression ratio 6.9:1 Maximum power 36 b.h.p. @ 5,000 r.p.m.Max Torque 47 lb/ft at 2800 r.p.m.Single Solex downdraft (30 F.A.I) carburatorIgnition Lucas coil

Gearbox and TransmissionBorg and Beck 7 1/4 in. single dry plate clutchFour speed gear box with ratios 5.43, 7.96, 12.32 and 19.5 to 1Synchromesh on second, third and fourth gearsHardy-Spicer open propeller shaftSpiral bevel final drive

Wheels and Brakes16 inch pressed steel easy-clean wheels5.00 X 16 inch Goodyear tiresTyre pressure: 20 lbs. sq. in. front, 22 lbs. sq. in. rearGirling mechanical brakes with 8 in drums

SteeringBurman worm and nut

SuspensionSemi-elliptic leaf front and rearArmstrong hydraulic shock absorbers

Main DimensionsWheelbase 7 ft. 7 ins.Track 3 ft 9 inOverall length 12 ft 7 3/4 inWidth 4 ft 7 3/4 inHeight (hood up) 4 ft 10 1/2 inTurning circle 34 ftGround clearance 5 1/2 inWeight 15 cwt

Price
£450 plus £125 15s purchase tax