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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.

Anyone who has additional specifications, or corrections please e-mail them to the webmaster -- thanks.


 

 MG Vehicle Specifications
  T SeriesB Roadster
 Model Year1950 - 19531950 - 19531962-19651965 -19701971-19731974-19751976-1980
 ModelTD / TD2TD MKIIMk IMk IIMk IIIBlack Bumper Black Bumper 
Vehicle Identification
 Vehicle Number Locationplate on left front of tool boxplate on left front of tool boxTop left-hand side if the front bulkheadTop left-hand side if the front bulkheadTop left-hand side if the front bulkheadTop left-hand side if the front bulkheadTop left-hand side if the front bulkhead
 Body Number Location       
 Engine Number Locationearly plate on bell housing above starterRH side of blockMetal plate right-hand side of cylinder blockMetal plate right-hand side of cylinder blockMetal plate right-hand side of cylinder blockMetal plate right-hand side of cylinder block 
 late on RH side of block
 Gearbox Number Location  Top of gearbox, left of dipstick and filler plugTop of gearbox, left of dipstick and filler plugTop of gearbox, left of dipstick and filler plugTop of gearbox, left of dipstick and filler plugTop of gearbox, left of dipstick and filler plug
 Rear Axle Number Location  Front of left-hand axle tube by spring seatFront of left-hand axle tube by spring seatFront of left-hand axle tube by spring seatFront of left-hand axle tube by spring seatFront of left-hand axle tube by spring seat
Tune Up 
 Engine Firing Order1,3,4,21,3,4,21, 3, 4, 21, 3, 4, 21, 3, 4, 21, 3, 4, 21, 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 rpm500 rpm850 rpm850 rpm850 rpm
 Static Ignition TimingTDCTDC10 BTDC (HC), 8 BTDC (LC)10 BTDC (HC), 8 BTDC (LC)   
 Dynamic Ignition Timing  14 BTDC @ 600 rpm14 BTDC @ 600 rpm1971-1972 - 16 BTDC @ 1500 rpm; 1973-1974 - 11 BTDC @ 1500 rpm13 BTDC @ 1500 rpm10 BTDC @ 1500 rpm
 Timing Mark Locationtiming case & crank pulleytiming case & crank pulleyNotch on crankshaft pulley, pointers on timing chain coverNotch on crankshaft pulley, pointers on timing chain coverNotch on crankshaft pulley, pointers on timing chain coverNotch on crankshaft pulley, pointers on timing chain coverNotch on crankshaft pulley, pointers on timing chain cover
 Distributor Make/TypeLucas (symmetric or asymmetric Dist cams -- Suffix A-D)Lucas( high lift Dist Cam --suffix E)Lucas 25DLucas 25DLucas 25DLucas 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 Rotoranti-clockwiseanti-clockwiseanti-clockwiseanti-clockwiseanti-clockwiseanti-clockwiseanti-clockwise
 Dwell Anglesym 45 +/- 4 / asym 49 +/-4 degrees60 +/-3 degrees60 +/-3 degrees60 +/-3 degrees60 +/-3 degrees60 +/-3 degrees 
 Ignition Coil Make/TypeLucas Q12Lucas Q12Lucas 12 voltLucas 12 voltLucas 12 voltLucas 12 volt for ballasted systemLucas 12 volt for ballasted system
 Spark Plug Make/TypeChampion L-86 to eng #22734, then N5N5Champion N-9YChampion N-9YChampion N-9YChampion N-9YChampion 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/Typetwin SU H6twin SU H6Twin SU HS4Twin SU HS4Twin SU HIF4Single Zenith Stromberg type 175 CD5TSingle Zenith Stromberg type 175 CD5T
 Carburetor Main Jet.090".090".090".090".090"  
 Carburetor Main Jet NeedleESLS1MB, 5, FX, AAE, AALMB, 5, FX, AAE, AALAAU, ABD  
 Carburetor Piston Springnilblueredredred  
Vehicle & Engine
 Length12' 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 overriders13 ft 2 1/4 in (4 m)13 ft 2 1/4 in (4 m)
 Width4' 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)
 Height4' 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 Clearance6"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 Front47-3/8"47-3/8"4 ft 1 in (124.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels4 ft 1 in (124.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels4 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 wheels4 ft 1 1/2 in (124.7 cm) pressed spoke wheels, 4 ft 1 in (124.4 cm) wire wheels
 Track Rear50"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 wheels4 ft 1 3/4 in (126.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels
 Wheelbase7' 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 Circle31" 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-In001/16 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 Weight2011 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) max2430 lb (1102 kg) max2753 lb (1249 kg) max2710 lb (1229 kg)2836 lb (1287 kg)
 Original Tire Size5.50-155.50-155.60-14 or 155-145.60-14 or 155-14165-14165-14165-14
 Original Tire Pressure Front (Cold)  18 or 2120   
 Original Tire Pressure Rear (Cold)  18 or 2424   
 Replacement Tire Size165x15165x15165SR-14165SR-14165SR-14165SR-14165SR-14
 Engine Type4 cyl inline ohv, XPAG/TD & TD24 cyl inline ohv, XPAG/TD34 cyl inline ohv 3 Bearing4 cyl inline ohv 5 Bearing4 cyl inline ohv 5 Bearing4 cyl inline ohv 5 Bearing4 cyl inline ohv 5 Bearing
 Engine Displacement1250 cc1250 cc1798 cc (109.8 ci)1798 cc (109.8 ci)1798 cc (109.8 ci)1798 cc (110 ci)1798 cc (110 ci)
 Firing Order1,3,4,21,3,4,21, 3, 4, 21, 3, 4, 21, 3, 4, 21, 3, 4, 21, 3, 4, 2
 Compresssion Ratio7.25 : 17.25 : 18.8:1 (HC), 8.0:1(LC)8.8:1 (HC), 8.0:1(LC)8.0:18.0:18.0:1
 Engine Bore2.618"2.618"3.16 in (80.26 mm)3.16 in (80.26 mm)3.16 in (80.26 mm)3.16 in (80.3 mm)3.16 in (80.3 mm)
 Engine Stroke3.543"3.543"3.5 in (89 mm)3.5 in (89 mm)3.5 in (89 mm)3.5 in (88.9 mm)3.5 in (88.9 mm)
 Number of Cylinders

4

4

4

4

4

4

4

 Oil Pressure Idle  10 to 25 lb/in2 (.7 to 1.10 to 25 lb/in2 (.7 to 1.10 to 25 lb/in2 (.7 to 1.10 to 25 lb/in2 (.17 to 110 to 25 lb/in2 (.17 to 1
 Oil Pressure Normal50-70 psi50-70 psi50 to 80 lb/in2 (3.5 to 5.6 kg/cm2)50 to 80 lb/in2 (3.5 to 5.6 kg/cm2)50 to 80 lb/in2 (3.5 to 5.6 kg/cm2)50 to 80 lb/in2 (3.5 to 5.6 kgf/cm2)50 to 80 lb/in2 (3.5 to 5.6 kgf/cm2)
 Charging SystemDynamo (generator)Dynamo (generator)GeneratorGenerator (65-67) Alternator (68 on)AlternatorAlternatorAlternator
 Ignition TypepointspointspointspointspointsLucas electronicLucas electronic
 Fuel Pump Make/TypeSU electricSU electricSU type HP or AUF 300 electricSU type HP or AUF 300 electricSU type AUF 300 electricSU type AUF 300 electricSU type AUF 300 electric
 Fuel Tank Capacity12-1/2 imperial gal.12-1/2 imperial gal.12 US gallons14 US gallons12 gal, 14 gal with evaporative loss system12 US gallons13 US gallons
 Cooling System Capacity12 imperial pints12 imperial pints11.4 pints w/o heater, 12 pints w/ heater11.4 pints w/o heater, 12 pints w/ heater11.4 pints w/o heater, 12 pints w/ heater12 pints w/ heater14.4 pints w/ heater
 Sump Capacity9 imperial pints9 imperial pints9 pints9 pintsEarly cars -- 9 pints, 9.6 pints w/ oil cooler; late cars -- 6 pints, 7 1/4 pints w/ oil cooler6 pints, 7.25 pints w/ filter change6 pints, 7.25 pints w/ filter change
 Gearbox Capacity, non-overdrive1-1/4 imperial pints1-1/4 imperial pints5.6 pints5.6 pints6 pints6 pints6 pints
 Gearbox Capacity, overdrive  6 pints6 pints7 pints7.25 pints7.25 pints

Note Our Legal Advisor has recommended the following statement: 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.   They are provided as a convenience
to fellow enthusiasts and the author makes no expressed warranty to their accuracy, use at your own risk.

Last modified: April 26, 2005

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