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  • Triumph TR-X Roadster Technical details and specifications (1951)

    ENGINE:

    Cylinders: 4
    Bore: 85 mm.
    Stroke: 92 mm.
    Cubic capacity: 2,088 c.c.
    Piston area: 35.2 sq. in.
    Valves: Overhead pushrod
    Compression ratio: 7.0:1
    Max BHP: 71 b.h.p @ 4,200 r.p.m.
    Carburetter: Twin S.U. horizontal
    Ignition: Coil, vacuum advance
    Fuel pump: A.C. mechanical
    Plugs: make and type : Champion L.10
    Fuel capacity: 12 gallons
    Oil filter: Purolator full-flow
    Oil capacity: 1.5 gallons
    Cooling system: Pump and fan
    Water capacity: 1.5 gallon

    WHEELS TYRES:
    Wheel type: Pressed disc
    Tyre size: 5.50 x 16 in.

    ELECTRICAL EQUIPMENT:
    Electrical system: 12-volt
    Battery capacity: 51 amp./hrs.

    TRANSMISSION DRIVE LINE:
    Clutch: Borg and Beck 9 in.
    Gear ratios: Top: 3.58 3rd: 4.375 2nd: 7.32 1st: 15.5 Rev: 18.0
    Prop. shaft: Hardy Spicer
    Final drive: Hypoid bevel

    BRAKES:
    Brakes: Lockheed
    Brake drum diameter: 11 in
    Friction lining area: 193 sq. in.

    SUSPENSION:
    Suspension: Wishbone and coil spring Semi-elliptic with anti-roll bar
    Shock absorbers: Armstrong (piston type)

    STEERING:
    Steering gear: Cam and roller
    Steering wheel: 3-spoke
    Turning circle: 35ft

    DIMENSIONS AND WEIGHT:
    Wheelbase: 7 ft. 10 in.
    Track Front: 4 ft.10 in.
    Track Rear: 4 ft. 6 In
    Overall length: 13 ft. 10 in.
    Overall width: 5 ft.10 in.
    Overall height: 4ft 7 in
    Ground clearance: 7.5 in
    Dry weight: 22.9 cwt.

    © Motor car History

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Triumph TR-X Roadster "Silver Bullet"

Triumph TR-X Roadster "Silver Bullet" 
Manufacturer Triumph
Production 1950 to 1951
Produced 3
Class Prototype Concept
Body style Roadster 
Engine 2,088 c.c.
Wheelbase 7 ft. 10 in. 
Length 13 ft. 10 in. 
Width 5 ft.10 in.
Height 4ft 7 in

 

This Triumph TR-X Roadster car was first announced in October 1950 motor shows in Paris and at Earls Court motor shows.

History

The Triumph Roadster prototypes fitted with light aluminium body panels on a open body mechanically using Renown saloon and Standard Vanguard parts but substantially lower and smoother body shape that features at the front enclosed headlights and air intake with horizontal chromium-plated slats the chromium-plated grill can be quickly detached. The back of the body has opening the locker lid for the luggage space and fuel tank location on the smaller wheel base of 7 ft. 10 in.

This Triumph Roadster incorporated more power actuated components than any previous British car. Those components including: headlights concealed behind shutters automatically opened when the headlights were switched on; windows; An electro-hydraulic motor under the bonnet supplies power for seats with back and forth adjustment along with the folding hood that is also raised or lowered by hydraulic jacks. from the pair of quick-acting clips. via a switch central locking mechanism, and then swinging the cover up by hand through 90 degrees. and radio aerial. Some of the electro-hydraulic mechanisms were concealed between the twin skins of the body along with matched loudspeakers within the walls of the double skin. A deep recess in the scuttle provides accommodation for the battery and heater, supplying air to the interior via ducts behind the windscreen.The doors are hinged at the front and the locks are of push-button type, The hydraulic door windows are also raised or lowered by hydraulic system.

Triumph TR-X Roadster Technical details "Silver Bullet"

Inside the bench-type front seat using Dunlopillo for the upholstery. fitted with a wide centre armrest .The leather covered facia panel is laid out with central grouping of the instruments Beneath the facia panel a parcels tray runs the full width of the car, the steering wheel is also leather covered,there is a space behind the rear seats which can be used for carrying small cases .

With an higher output 4 cylinder engine, this gave the Triumph Roadster a top speed of 85 m.p.h with engine output of 71 b.h.p at 4,200 r.p.m.,with two horizontal S.U. carburetters an improved version used in the Roadster engine with higher compression ratio.On the Roadster, four speed gearbox is standard equipment the top gear an electrically operated Laycock-de Normanville overdrive with a rear-axle ratio of 4.375 : 1.The brake system features Lockheed 11-in. diameter by 21-in. wide brake drums.

The TR-X was discontinued after only three prototypes had ever been built by 1951.

Triumph TR-X Roadster specifications "Silver Bullet"