Information taken from Rover workshop manual.
| Engine |
| Type |
Water cooled, overhead camshaft |
| Number of cylinders |
Four |
| Bore |
3.375 in (8.57 cm) |
| Stroke |
3.375 in (8.57 cm) |
| Capacity |
120.8 cu/in (1978cc) |
| Compression ratio - UK and NADA |
10:1 |
| Compression ratio - other |
9:1 |
| Brake horsepower |
| Gross |
| 10:1 compression ratio |
9:1 compression ratio |
| 124 at 5,000 rpm |
117 at 5,500 rpm |
|
| Installed |
| 10:1 compression ratio |
9:1 compression ratio |
| 114 at 5,500 rpm |
107 at 5,500 rpm |
|
| Maximum torque |
| Gross |
| 10:1 compression ratio |
9:1 compression ratio |
| 132 lb/ft (18.2 mkg) at 4,000 rpm |
125 lb/ft (17.2 mkg) at 3,750 rpm |
|
| Installed |
| 10:1 compression ratio |
9:1 compression ratio |
| 126 lb/ft (17.3 mkg) at 3,500 rpm |
120 lb/ft (16.5 mkg) at 3,250 rpm |
|
| Maximum BMEP, Installed |
| 10:1 compression ratio |
157 lb/sq.in at 3,500 rpm |
| 9:1 compression ratio |
150 lb/sq.in at 3,250 rpm |
| Compression pressure at cranking speed (200 rpm) |
| 10:1 compression ratio |
190 lb/sq.in minimum |
| 9:1 compression ratio |
160 lb/sq.in minimum |
| Pistons |
| Speed |
3,100 ft/minute at maximum bhp |
| RPM |
| Maximum |
6,250 |
| Spark plugs |
| 10:1 compression ratio |
Champion N6Y - 14 mm with supressed cables and waterprrof covers |
| 9:1 compression ratio |
| Point gap |
0.025 in (0.70 mm) |
| Ignition timing (static - full retard) |
| 10:1 compression ratio minimum 100 octane fuel |
6 degrees BTDC |
| 9:1 compression ratio, minimum 95 octane fuel |
6 degrees BTDC |
| Firing order (both compressions) |
1 - 3 - 4 - 2 |
| Distributor |
| Contact breaker gap |
0.014 to 0.016 in (0.35 to 0.40 mm) |
| Valve timing |
| Inlet opens |
14 degrees BTDC |
| Inlet closes |
46 degrees ABDC |
| Exhaust opens |
44 degrees BBDC |
| Exhaust closes |
16 degrees ATDC |
| No. 1 exhaust valve peak |
104 degrees BTDC |
