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*****Roadster 62-70 GT 67-70Roadster GT 71-74Roadster 75-80
Firing Order 1 3 4 2 1 3 4 2 1 3 4 2
Rocker Clearance .015" (.38mm) .015" (.38mm) .015" (.38mm)
Idle Speed 500 rpm 900 rpm 850 rpm
Static Ign Timing 10 BTDC (HC)
8 BTDC (LC)		 ***** *****
Dynamic Ign Timing 14 BTDC @ 600 rpm 1971/2
16 BTDC @ 1500 rpm		 13 BTDC @ 1500 RPM wo/cat rpm
***** ***** 1973/4
11 BTDC @ 1500 rpm		 10 BTDC @ 1500 rpm w/cat
Contact Breaker .014 to .016"
(36 to 41 mm)		 .014 to .016"
(36 to 41 mm)		 .014 to .016"
(36 to 41 mm)
Rotation of the Rotor Anti-clockwise Anti-clockwise Anti-clockwise
Dwell Angle 60 + or -3 Degrees 60 + or -3 Degrees *****
Ground Polarity Pos to 1967 Neg 1968 on Negative Negative
Points 12V Points 12V Points 12V Ballasted 9v coil
Suggested Spark Plug Champion N9Y Champion N9Y Champion N9Y
Spark Plug Gap .025" (.64 mm) .025" (.64 mm) .025" (.64 mm)
Carburetor Twin SU HS4 Twin SU HIF4 Single Stromburg CD175
Carb Main Jet .090" .090" *****
Carb Needle MB,5,FX,AAE,AAL AAU,ABD *****
 
VEHICLE & ENGINE
*****Roadster 62-70
GT 67-70		Roadster
GT 71-74		Roadster 75-80
Length (with overriders) 12ft 9-7/16" (3.9 m) 12ft 9-3/16" (3.89 m) 13ft 2-1/4" (4 m)
Width 4ft 11-15/16" (152.3 m) 4ft 11-16/16" (152.3 m) 4ft 11-15/16" (152.3 m)
Height 4ft 1-3/8" (125.4 cm) 4ft 1-3/8" (125.4 cm) 4ft 1-3/8" (125.4 cm)
Ground Clearance 5" (12.7 cm) min 5" (12.7 cm) min 5" (12.7 cm) min
Track Front Steel Wheels 4ft 1" (124.4 cm) 4ft 1" (124.4 cm) 4ft 1" (124.4 cm)
Wire Wheels 4ft 1-1/4" (125 cm) 4ft 1-1/4" (125 cm) 4ft 1-1/4" (125 cm)
Track Rear Steel Wheels 4ft 1-1/4" (125 cm) 4ft 1-1/4" (125 cm) 4ft 1-3/4" (126.4 cm)
Wire Wheels 4ft 1-1/4" (125 cm) 4ft 1-1/4" (125 cm) 4ft 1-1/4" (125 cm)
Wheelbase 7ft 7" (231.1 cm)  7ft 7" (231.1 cm) 7ft 7" (231.1 cm)
Turning Circle 32ft (9.75 m) 7ft 7" (231.1 cm) 7ft 7" (231.1 cm)
Toe-In 1/16" to 1/32" 1/16" to 1/32" 1/16" to 1/32"
Unladen Weight RD 1920 lbs (871 kg) 2303 lbs (1044 kg) 2290 lbs (1039 kg)
Unladen Weight GT 2190 lbs (993 kg) 2401 lbs (1088 kg) 1975-76  2416 lbs (1097 kg)
Curb Weight RD 2030 lbs (920 kg) 2653 lbs (1203 kg) 2590 lbs (1174kg)
Curb Weight GT 2310 lbs (1048 kg) 2751 lbs (1248 kg) 1975-76  2716 lbs (1234 kg)
Gross Weight (Max) RD 2430 lbs (1102 kg) 2753 lbs (1249 kg) 2710 lbs (1229 kg)
Gross Weight (Max) GT 2660 lbs (1206 kg) 2851 lbs (1293 kg) 1975-76  2836 lbs (1287 kg)
Original Tyre Size 1962-64  155-14"  1965 on  165-14" 165-14"
Replacement Tyre size 165SR-14" 165SR-14" 165SR-14"
Tyre Pressure Front (Cold) 18-12 lbs  20 lbs 21 lbs
Tyre Pressure Rear (Cold) 18-24 lbs 24 lbs 24 lbs
Engine Type 4 cyl. inline OHV 4 cyl. inline OHV 4 cyl. inline OHV
Engine Displacement 1798 cc (110 ci) 1798 cc (110 ci) 1798 cc (110 ci)
Firing Order 1,3,4,2 1,3,4,2 1,3,4,2
Compression Ratio 8.8 to1 (HC) 8.0 to 1 (LC) 8.0 to 1 8.0 to 1
Engine Bore 3.16" (80.26 mm)  3.16" (80.26 mm)  3.16" (80.26 mm) 
Engine Stroke 3.5" (89 mm) 3.5" (89 mm) 3.5" (89 mm)
Number of Cyl. 4 4 4
Oil Pressure at Idle 10 to 25 lbs (7 to 1.7 kg 10 to 25 lbs (7 to 1.7 kg 10 to 25 lbs (7 to 1.7 kg
Oil Pressure Normal 50 to 80 lbs (3.5 to 5.6 kg) 50 to 80 lbs (3.5 to 5.6 kg) 50 to 80 lbs (3.5 to 5.6 kg)
Ignition Type Points Points Lucas Electronic
Fuel Pump Make/Type SU type HP or AUF 300 electric SU type AUF 300 electric SU type AUF 300 electric
Fuel Tank Capacity Early 12 gall. Late 14 gal. 14 gal. 12 w/evap Loss System 12 gal. (75-76) 13gal. 77 on
Cooling System Capacity 12 pints w/Heater 12 pints w/Heater 12 pints w/Heater 14.4  77-on
Sump Capacity 9 pints Early 9 pints 9.6 w/Cooler 6 pints 7.25 w/Filter 
    Late  7-1/4 pints w/Cooler  
Gearbox Capacity non-O/D 5.6 pints 6 pints 6 pints
Gearbox Capacity w/overdrive 6 pints 7 pints 7.25 pints
Rear Axle Capacity 2.7 pints 2 pints 2 pints