Engine Data
2000 cc 4 Cylinder engines (Including diesel model)
| V8 3500cc engines | 6 cylinder 2300/2600cc engines | Transmission |

Engine type 20H Single overhead camshaft
Firing order: 1,3,4,2 
Compression Ratio's 9.0:1
Oil Pressure Running  4.2 to 6.3 bar (60 to 90 lbf/in²)
    "       "           Idle          2.8 to 4.2 bar (40 to 90 lbf/in²) 

Cylinder pressure 10.5 to 11.9  kgf/cm² (150 to 170 lbf/in²)
Idle speed 775± 25 RPM 
CO reading at idle 2.0% to 3.0% 
Ignition timing @ 2500 RPM 25° B.T.D.C. (Vacuum disconnected) 
Tappet clearance (standard) 0.30 ± 0.03 mm (0.012 ± 0.001 in)
Adjust only if less than 0.02 mm (0.008 in)

Distributor
Type Lucas 48 D 4 rotation anti-clockwise.
Dwell angle 47° to 59°
Contact gap 0.35 to 0.40 mm (0.014 to 0.016 in)
Coil Unipart GCL 130. Ballast resistance 1.3 to 1.5 ohms 
Spark plugs Unipart GSP 361. Gap 0.90 mm (0.035 in)

Carburetter twin SU HIF 44 WITH Solex F.A.S.D.
Specification No FZX 1383
Jet 2.5 mm (0.100 in)
Needle size  BFG
Spring colour Red

SD1 Series 2, 2000, 1985 on (with electronic mixture control)

Engine type Single overhead camshaft
Firing order: 1,3,4,2 
Compression Ratio's 9.0:1
Oil Pressure Running  4.2 to 6.3 bar (60 to 90 lbf/in²)
   "          "         Idle          2.8 to 4.2 bar (40 to 90 lbf/in²) 

Cylinder pressure 10.5 to 11.9  kgf/cm² (150 to 170 lbf/in²)
Idle speed manual 750± 50 RPM
Idle speed Auto       800± 50 RPM 
CO reading at idle 2.5% ± 1%
Ignition timing @ 2500 RPM 25° B.T.D.C. (Vacuum disconnected) 
Tappet clearance (standard) 0.30 ± 0.03 mm (0.012 ± 0.001 in)
Adjust only if less than 0.02 mm (0.008 in)

Distributor
Type Lucas 65 DM 4 rotation anti-clockwise.
Coil Ducellier 520 067A
Ignition module Lucas AB14 
Spark plugs Unipart GSP 4563. Gap 1.0 mm (0.040 in)

Carburetter twin SU HIF 44E (with electronic mixture control) 
Specification No FZX 1450
Jet 2.5 mm (0.100 in)
Needle size  BFX
Spring colour Red
Fuel and needle seat 0.070 in.

2400 SD Turbo 4 cylinder  model HR 492HT 1982 on 

Approximate engine Capacity 2393 cm³
Firing order: 1,3 4, 2, 
Compression Ratio 21:1
Compression pressure     24 to 26 kgf/cm²                          146.03 in³
Oil Pressure @ 2000 RPM 60 to 65 lbf/in² 
Bore 92 mm 
Stroke 90mm
System pressure @ 2000 RPM 4.5 to 5.0  (kgf/cm² kgf/in²)   64 to 71 lbs/in²
Pressure relief valve opens     4.0 to 4.5k (gf/cm²                  57 to 64 lbs/in²
Pressure relief valve spring free lenght 57.5 mm                    2.24 in

Idle speed 800 to 830 RPM 

CO reading at idle 0.0% to 4.5% 
Ignition timing Static 10° B.T.D.C. Dynamic 10° B.T.D.C* 

Vacuum disconnected) @ 800 RPM*

Distributor
Type Lucas 54 D 6 rotation anti-clockwise.
Contact gap 0.36 to 0.41 mm (0.014 to 0.016 in)
Coil Lucas 16C9 6 volt with ballast resistor
Spark plugs Champion BNY9 Gap 0.65 mm (0.025 in)

Carburetter twin sidedraught S.U. type HS6
Jet 2.5 mm (0.100 in)
Needle size  2300 BEB
 "          "    2600 BEA
Spring colour Yellow