These specifications are presented in good faith researching information from various sources. However, no guarantee or warranty is given to the accuracy of the above information. You are advised to verify the correctness of these specifications prior to using them. Use of these specifications assumes agreement with the disclaimer below. They are provided as a convenience to fellow enthusiasts and the author makes no expressed warranty to their accuracy, use at your own risk.
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| | MG Vehicle Specifications |
| | | T Series | B Roadster |
| | Model Year | 1950 - 1953 | 1950 - 1953 | 1962-1965 | 1965 -1970 | 1971-1973 | 1974-1975 | 1976-1980 |
| | Model | TD / TD2 | TD MKII | Mk I | Mk II | Mk III | Black Bumper | Black Bumper |
| Vehicle Identification |
| | Vehicle Number Location | plate on left front of tool box | plate on left front of tool box | Top left-hand side if the front bulkhead | Top left-hand side if the front bulkhead | Top left-hand side if the front bulkhead | Top left-hand side if the front bulkhead | Top left-hand side if the front bulkhead |
| | Body Number Location | | | | | | | |
| | Engine Number Location | early plate on bell housing above starter | RH side of block | Metal plate right-hand side of cylinder block | Metal plate right-hand side of cylinder block | Metal plate right-hand side of cylinder block | Metal plate right-hand side of cylinder block | |
| | late on RH side of block |
| | Gearbox Number Location | | | Top of gearbox, left of dipstick and filler plug | Top of gearbox, left of dipstick and filler plug | Top of gearbox, left of dipstick and filler plug | Top of gearbox, left of dipstick and filler plug | Top of gearbox, left of dipstick and filler plug |
| | Rear Axle Number Location | | | Front of left-hand axle tube by spring seat | Front of left-hand axle tube by spring seat | Front of left-hand axle tube by spring seat | Front of left-hand axle tube by spring seat | Front of left-hand axle tube by spring seat |
| Tune Up | |
| | Engine Firing Order | 1,3,4,2 | 1,3,4,2 | 1, 3, 4, 2 | 1, 3, 4, 2 | 1, 3, 4, 2 | 1, 3, 4, 2 | 1, 3, 4, 2 |
| | Valve Rocker Clearance | .019" to eng #24115, .012" from eng. #24116 | .012" | .015 in (.38 mm ) cold | .015 in (.38 mm ) cold | .015 in (.38 mm ) cold | .013 in (.33 mm ) warm | .013 in (.33 mm ) warm |
| | Idle Speed | | | 500 rpm | 500 rpm | 850 rpm | 850 rpm | 850 rpm |
| | Static Ignition Timing | TDC | TDC | 10º BTDC (HC), 8º BTDC (LC) | 10º BTDC (HC), 8º BTDC (LC) | | | |
| | Dynamic Ignition Timing | | | 14º BTDC @ 600 rpm | 14º BTDC @ 600 rpm | 1971-1972 - 16º BTDC @ 1500 rpm; 1973-1974 - 11º BTDC @ 1500 rpm | 13º BTDC @ 1500 rpm | 10º BTDC @ 1500 rpm |
| | Timing Mark Location | timing case & crank pulley | timing case & crank pulley | Notch on crankshaft pulley, pointers on timing chain cover | Notch on crankshaft pulley, pointers on timing chain cover | Notch on crankshaft pulley, pointers on timing chain cover | Notch on crankshaft pulley, pointers on timing chain cover | Notch on crankshaft pulley, pointers on timing chain cover |
| | Distributor Make/Type | Lucas (symmetric or asymmetric Dist cams -- Suffix A-D) | Lucas( high lift Dist Cam --suffix E) | Lucas 25D | Lucas 25D | Lucas 25D | Lucas 45D4 (45DM CA Cars ) | Lucas 45DE4 or 45DM (1980 & retro) |
| | Contact Breaker (points) Gap | .010"-.012" | .014-".016" | .014 to .016 in (.36 to .41 mm) | .014 to .016 in (.36 to .41 mm) | .014 to .016 in (.36 to .41 mm) | .014 to .016 in (.36 to .41 mm) | |
| | Rotation of Rotor | anti-clockwise | anti-clockwise | anti-clockwise | anti-clockwise | anti-clockwise | anti-clockwise | anti-clockwise |
| | Dwell Angle | sym 45 +/- 4 / asym 49 +/-4 degrees | 60 +/-3 degrees | 60 +/-3 degrees | 60 +/-3 degrees | 60 +/-3 degrees | 60 +/-3 degrees | |
| | Ignition Coil Make/Type | Lucas Q12 | Lucas Q12 | Lucas 12 volt | Lucas 12 volt | Lucas 12 volt | Lucas 12 volt for ballasted system | Lucas 12 volt for ballasted system |
| | Spark Plug Make/Type | Champion L-86 to eng #22734, then N5 | N5 | Champion N-9Y | Champion N-9Y | Champion N-9Y | Champion N-9Y | Champion N-9Y |
| | Spark Plug Gap | .025" | .025" | .025 in (.64 mm) | .025 in (.64 mm) | .025 in (.64 mm) | .035 in (.90 mm) | .035 in (.90 mm) |
| | Carburetor Make/Type | twin SU H6 | twin SU H6 | Twin SU HS4 | Twin SU HS4 | Twin SU HIF4 | Single Zenith Stromberg type 175 CD5T | Single Zenith Stromberg type 175 CD5T |
| | Carburetor Main Jet | .090" | .090" | .090" | .090" | .090" | | |
| | Carburetor Main Jet Needle | ES | LS1 | MB, 5, FX, AAE, AAL | MB, 5, FX, AAE, AAL | AAU, ABD | | |
| | Carburetor Piston Spring | nil | blue | red | red | red | | |
| Vehicle & Engine |
| | Length | 12' 1" | 12' 1" | 12 ft 8 1/2 in (3.8 m) | 12 ft 8 1/2 in (3.8 m) | 12 ft 8 1/2 in (3.8 m), 12 ft 9 3/16 in (3.89 m) w/ Bumper overriders | 13 ft 2 1/4 in (4 m) | 13 ft 2 1/4 in (4 m) |
| | Width | 4' 10-5/8" | 4' 10-5/8" | 4 ft 11 15/16 in (152.3 cm) | 4 ft 11 15/16 in (152.3 cm) | 4 ft 11 15/16 in (152.3 cm) | 4 ft 11 15/16 in (152.3 cm) | 4 ft 11 15/16 in (152.3 cm) |
| | Height | 4' 5" | 4' 5" | 4 ft 1 3/8 in (125.4 cm) | 4 ft 1 3/8 in (125.4 cm) | 4 ft 1 3/8 in (125.4 cm) | 4 ft 1 3/8 in (125.4 cm) | 4 ft 1 3/8 in (125.4 cm) |
| | Ground Clearance | 6" | 6" | 5 in (12.7 cm) min. | 5 in (12.7 cm) min. | 5 in (12.7 cm) min. | 5 in (12.7 cm) min. | 5 in (12.7 cm) min. |
| | Track Front | 47-3/8" | 47-3/8" | 4 ft 1 in (124.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels | 4 ft 1 in (124.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels | 4 ft 1 in (124.4 cm) | 4 ft 1 1/2 in (124.7 cm) pressed spoke wheels, 4 ft 1 in (124.4 cm) wire wheels | 4 ft 1 1/2 in (124.7 cm) pressed spoke wheels, 4 ft 1 in (124.4 cm) wire wheels |
| | Track Rear | 50" | 50" | 4 ft 1 1/4 in (125 cm) | 4 ft 1 1/4 in (125 cm) | 4 ft 1 1/4 in (125 cm) | 4 ft 1 3/4 in (126.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels | 4 ft 1 3/4 in (126.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels |
| | Wheelbase | 7' 10" | 7' 10" | 7 ft 7 in (231.1 cm) | 7 ft 7 in (231.1 cm) | 7 ft 7 in (231.1 cm) | 7 ft 7 1/8 in (231.5 cm) | 7 ft 7 1/8 in (231.5 cm) |
| | Turning Circle | 31" 3" | 31" 3" | 32 ft (9.75 m) | 32 ft (9.75 m) | 32 ft (9.75 m) | 32 ft (9.75 m) | 32 ft (9.75 m) |
| | Toe-In | 0 | 0 | 1/16 to 3/32 in (1.5 to 2.3 mm) | 1/16 to 3/32 in (1.5 to 2.3 mm) | 1/16 to 3/32 in (1.5 to 2.3 mm) | 1/16 to 3/32 in (1.5 to 2.3 mm) | 1/16 to 3/32 in (1.5 to 2.3 mm) |
| | Empty Weight | | | 1920 lb (871 kg) | 1920 lb (871 kg) | 2303 lb (1044 kg) | 2290 lb (1039 kg) | 2416 lb (1097 kg) |
| | Curb Weight | 2011 lb (914 kg) | 2011 lb (914 kg) | 2030 lb (920 kg) | 2030 lb (920 kg) | 2653 lb (1203 kg) | 2590 lb (1174 kg) | 2716 lb (1234 kg) |
| | Gross Weight | | | 2430 lb (1102 kg) max | 2430 lb (1102 kg) max | 2753 lb (1249 kg) max | 2710 lb (1229 kg) | 2836 lb (1287 kg) |
| | Original Tire Size | 5.50-15 | 5.50-15 | 5.60-14 or 155-14 | 5.60-14 or 155-14 | 165-14 | 165-14 | 165-14 |
| | Original Tire Pressure Front (Cold) | | | 18 or 21 | 20 | | | |
| | Original Tire Pressure Rear (Cold) | | | 18 or 24 | 24 | | | |
| | Replacement Tire Size | 165x15 | 165x15 | 165SR-14 | 165SR-14 | 165SR-14 | 165SR-14 | 165SR-14 |
| | Engine Type | 4 cyl inline ohv, XPAG/TD & TD2 | 4 cyl inline ohv, XPAG/TD3 | 4 cyl inline ohv 3 Bearing | 4 cyl inline ohv 5 Bearing | 4 cyl inline ohv 5 Bearing | 4 cyl inline ohv 5 Bearing | 4 cyl inline ohv 5 Bearing |
| | Engine Displacement | 1250 cc | 1250 cc | 1798 cc (109.8 ci) |
