NASOC LOGO
 

Technical Specifications for the
4AB Roadster

Date of Manufacture--- 4AB Oct. 1950 to Jan. 1953

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 1. Reverse 19.5:1Synchromesh 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 hydro-mechanical brakes with 9 in drums

SteeringBurman high efficiency

SuspensionFront independent coil, rear semi-elliptic leafFront Armstrong telescopic shock absorbersRear Armstrong direct acting hydraulic shock absorbers

Main DimensionsWheelbase 7 ft. 7 ins.Track 3ft 10 3/4 inOverall length up to chassis No. 4AB7750U-12ft 6in.
                       From Chassis No 4AB7751U-12ft 7 1/2inWidth 4 ft 10 inHeight (hood up) 4 ft 10 1/2 inTurning circle 33 ftGround clearance 6 1/2 inWeight 15 1/2 cwt

Price
£450 plus £125 15s purchase tax