Triumph TR7, TR7V8 & TR8 Information

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TR7 Specifictions PDF Print E-mail
TRIUMPH TR7 1975-1981
Vehicle Identification
Vin Plate On front turrent
Vehicle Number Location Adjacent to the left hand door striker plate.
Body Number Location  
Engine Number Location On the cylinder block between the carburetors.
Gearbox Number Location Upper right hand side of the gearbox casing
Tune Up
Rear Axle Number Location Bottom flange of the axle housing.
Engine Firing Order 1-3-4-2
Valve Rocker Clearance Inlet 0.008 in. (0.2 mm), Exhaust 0.018 (0.457mm)
Idle Speed 800 RPM
Static Ignition Timing 10 degrees BTDC
Dynamic Ignition Timing (1975) 10 degrees BTDC @ 800 RPM, (1976-1980) 2 degrees ATDC @ 800 RPM
Timing Mark Location Located on the crankshaft pulley
Distributor Make/Type Delco Remy Series D302, Lucas 47DE4 Opus electronic
Contact Breaker (points) Gap Delco - Points gap 0.014-0.016 in. (0.34-0.41 mm), Lucas - Pick-up air gap 0.014-0.016 in. (0.34-0.4
Rotation of Rotor Anti-Clockwise
Dwell Angle 39 degrees
Ignition Coil Make/Type AC Delco coil, Lucas 15C6 coil
Primary Resistance 1.3 -1.5 ohms
Spark Plug Make/Type (Early models) Champion N-11Y, (Late models) Champion N-12Y
Spark Plug Gap 0.025 in. (0.64 mm)
Carburetor Make/Type (1975-1976 California) Dual Zenith Stromberg 175CD-4TV, (1975-1976 Federal) Dual Zenith Stromberg 175CD-SEVX, (1977) Dual Zenith Stromberg 175CD-FEVX, (1978-1979) Dual Zenith Stromberg 175CD-FVX, (1980-1981) Bosch electronic fuel injection
Carburetor Main Jet  
Carburetor Main Jet Needle (1975-1976) 45C, (1977-1979 Federal) B1DH, (1977-1979 California) B1EP, (1980) B1EP
Carburetor Piston Spring Zenith B18277 in Red (Moss Motors part # 365-780)
Vehicle & Engine
Length 164.3 in.(4173 mm)
Width 66.2in. (1681 mm)
Height 49.9 in. (1268 mm)
Ground Clearance 3.5-4.5 in. (90-114 mm) depending on modeland loading
Track Front 55.5 in. (1409 mm)
Track Rear 55.3 in. (1404 mm)
Wheelbase 85 in. (2160 mm)
Turning Circle 31.5 feet (9.5 m)
Toe-In 0-1/16 in. (0-1.6 mm)
Unladen Weight 4-Speed 2158 lbs. (979 kgs.), 5-speed 2264 lbs. (1027 kgs.)
Curb Weight 4-Speed 2249 lbs. (1020 kgs.), 5-speed 2355 lbs. (1068 kgs.)
Gross Weight 4-Speed 2820 lbs. (1279 kgs.), 5-speed 2906 lbs. (1318 kgs.)
Original Tire Size 175/70 HR 13
Original Tire Pressure Front (Cold) 24 lb./in. square (1.68 kg/square cm)
Original Tire Pressure Rear (Cold) 28 lb./in. square (1.96 kg/square cm)
Replacement Tire Size 175/70 HR -13
Engine Type (Early model) SOHC, 4-cyl, inclined 40 degrees to vertical. (Late model) SOHC, 4-cyl, inclined 45 degrees to vertical.
Engine Displacement 122 cc)
Firing Order  
Compresssion Ratio 8.0:1
Engine Bore 3.56 in. (90.3 mm)
Engine Stroke 3.07 in. (78.0mm)
Number of Cylinders 4
Oil Pressure Idle  
Oil Pressure Normal  
Ignition Type (Early models) Contact Breaker type AC Delco ignition, (Late model) Opus electronic ignition Lucas 47DE4
Fuel System Type (1975-1979) Dual Zentih Stromberg side draft carburetors, (1980-1981) Lucas electronic fuel injection
Fuel Pump Make/Type AC mechanically operated diaphragm type.
Fuel Tank Capacity 14.4 gallons (5.4 litres)
Cooling System Capacity 16.0 pints with heater (7.7 litres)
Sump Capacity 9.5 pints (4.5 litres)
Gearbox Capacity, non-overdrive 2.4 pints (1.1 litres)
Gearbox Capacity, overdrive 3.3 pints (1.5-litres)
Gearbox Capacity, automatic (w/cooler) 11.6 pints (5.5 litres), (w/o cooler) 11.0 pints (5.2 litres)