Re: no lead head

[Dave Brown <davebrown1@earthlink.net>]

>From Chilton's MG Manual

YEAR     Engine   Disp    HP@RPM    Torque      Bore and       Comp
oil
               code
@rpm        Stroke         ratio    press.

61-62        9CG     948   46@5500    53@3000    2.478x3.000    8.9:1
30-60

63-64       10CG    1098   55@5500    62@3250    2.543x3.296    8.9:1
30-60

65-66       10CG    1098   55@5750    65@3500    2.543x3.296    8.9:1
30-60

1967        12CC/E  1275   65@6000    72@3000    2.780x3.200    8.8:1
40-70

68-70        12CD    1275   62@6000    72@3000    2.780x3.200
8.8:1    40-70

1971         12CJ    1275   62@6000     72@3000    2.780x3.200
8.8:1    40-70

1972         12V     1275   62@6000     72@3000    2.780x3.200
8.0:1    40-70

1973         12V     1275   55@5500     67@3200    2.780x3.200
8.0:1    40-70

1974         12V     1275   50@6000     67@3000    2.780x3.200
8.0:1    40-70

1975      PE94J     1493    57@5000     71@3000    2.900x3.440
7.5:1    40-60

1976-9    PE94J     1493    55.5@5000   67@2500    2.900x3.440
7.5:1    40-60
US Version

1976-9    PE94J     1493    48@5000      -----------    2.900x3.440
7.5:1    40-60
California Version


Hope this is helpful in answering the compression question,

Dave