All engines are 848cc OHV, 4 cylinder, four stroke, water cooled. Die cast aluminium block with removable cast iron liners. 

Performance figures:

(Automotive to DIN 70020)
848HC 9.5:1
Power: ....................... 29.1kw (39.0 BHP) at 5500 rpm
Torque: ....................... 60.0 Nm (44.25 lb/ft) at 3500 rpm
Max. BMEP: ............... 889 kN/sq. m (129 lb/sq. in)

Engine Specification:
General Data: 

4 cylinder, four stroke, water cooled die cast aluminium cylinder block with removable cast iron liners. Die cast aluminium cylinder head with valve seats for lead free applications and cast iron valve guides. Forged steel counter-balanced crankshaft mounted on 3 lead bronze steel-backed bearings. Forged steel connecting rods mounted on lead bronze steel-backed bearings.

Bore: ......................................................62.50 mm (2.46 in)
Stroke: ...................................................69.09 mm (2.72 in)
Firing order: ...........................................1, 3, 4, 2
Crankcase ventilation: ...........................Sealed unit - breathing into carburettor
Engine mounting: ...................................4 point suspension on rubber mountings (2 on gearbox)
Clutch: .....................................................159 mm (6-1/4 in) Dry single plate
Carburettor: .............................................1 ¼” SU HS2
Fuel pump: ...............................................Mechanical
Air cleaner: ...............................................Paper element
Oil filter: .....................................................Full flow, replaceable
Water pump: .............................................Centrifugal, belt driven
Fan: ...........................................................Mechanical, 254 mm (10 in) 3 blade
Electrics: ..................................................12V, negative earth
Alternator: .................................................A127/45, 45 amp output
Starter motor: ............................................Pre-engaged type
Distributor: .................................................Sliding contact breaker points
Drive: ..........................................................Skew gear from camshaft
Ignition advance: .......................................Centrifugal and vacuum
Points gap: ..................................................0.38mm or 15 thou’
Spark plug gap: ..........................................0.64mm or 25 thou’
Valve Clearance Inlet: …………………….0.25 mm or 10 thou’ Hot
Valve Clearance Inlet: ………………….....0.152 mm or 6 thou’ Cold
Valve Clearance Exhaust: ……………….025 mm or 10 thou’ Hot
Valve Clearance Exhaust: ……………….0.152 mm or 6 thou’ Cold