Tune-up Data
COMPRESSION PRESSURE
850/1000 (inc. Clubman) (59-76)8.3:1 cr150 psi (10.5 kg/cm 2)
850/1000 (inc. Clubman) (76 on)8.3:1 cr170 psi (11.9 kg/cm2)
850/1000 (inc. Clubman) - Auto (65-74)8.9:1 cr160 psi (11.25 kp,/cm2)
850/1000 (inc. Clubman) - Auto (74-76)8.3:1 cr150 psi (10.5
850/1000 (inc. Clubman) - Auto (76 on)8.3:1 cr170 psi (11.9
Clubman 1100 (74 on)8.5:1 cr165 psi (11.6
1275 GT (69 on)8.8:1 cr175 psi (12.3
VALVE CLEARANCESAll, inlet and exhaust0.012 in (0.30 mm), cold
IGNITION
Spark plugs Make/typeChampion N9Y*
Electrode gap0.025 in (0.65 mm)
*N5 plugs can be used in pre '72 850/1 000 manual models, and pre '74 automatic models

Firing order		1 - 3 - 4 - 2
Cylinder numberingFrom front (radiator end of engine)
Distributor rotor rotationAnti-clockwise
Contact breaker gap0.014 - 0.016 in (0.35 - 0.40 mm)
Dwell angle
DM2 and 25D4 Distributors60' +/- 3'
43D4 and 45D4 Distributors51' +/- 5'
IGNITION TIMING
ModelYearStaticStroboscopic
85059 - 72TDC3' BTDC/600 rpm VD
850 (Van and Pick-up with regular fuel distributor)59 - 727' BTDC10' BTDC/600 rpm VD
85072 - 74TDC19' BTDC/1000 rpm VD
850 (Iiirnited number of engines, '74 on)72 - 749' BTDC14' BTDC/1000 rpm VD
850 (ECE 15)74 - 766' BTDC11' BTDC/1000 rpm VD
850 (ECE 15)76 on - 7' BTDC/1000 rpm VD
850 - Auto65 - 693' BTDC6' BTDC/600 rpm VD
1000/Clubman 100067 - 725' BTDC8' BTDC/600 rpm VD
1000/Clubman 1000 Van and Pick-up with regular fuel distributor67 - 727' BTDC10' BTDC/600 rpm VD
1000/Clubman 100072 - 745' BTDC11' BTDC/1000 rpm VD
1000/Clubman 1000 (limited number of engines '74 on)72 - 7410' BTDC13' BTDC/1000 rpm VD
1000/Clubman 1000 (ECE 15)74 - 784' BTDC7' BTDC/1000 rpm VD
1000/Clubman 1000 (ECE 15)78 - 8' BTDC/1000 rpm VD
1000/Clubman 1000 - Auto67 - 744' BTDC6' BTDC/600 rpm VD
1000/Clubman 1000 - Auto (ECE 15)74 -784' BTDC7' BTDC/1000 rpm VD
1000/Clubman 1000 - Auto (ECE 15)78 - 8' BTDC/1000 rpm VD
Clubman 1100 (ECE 15)74 - 769' BTDC12' BTDC/1000 rpm VD
Clubman 1100 (ECE 15)76 - 78 - 12' BTDC/1000 rpm VD
1275 GT69 - 728' BTDC10' BTDC/600 rpm VD
1275 GT (ECE 15)72 - 768' BTDC13' BTDC/1000 rpm VD
1275 GT (ECE 15)76 - 77 - 13' BTDC/1000 rpm VD
NOTE: Engine idle speeds can be found in FUEL Technical Data