Hello. A couple of questions you might be able to help me with:
1) What was the difference between a 420 and a 420G?
2) Was the 420G offered in the U.S. only in 1967?

Thanks for your help. Rick.

Submitted by Urmine.inblood… on Thu, 05/02/2013 - 04:18

The 4.2-litre XK engine of the jaguar 420/Sovereign was fitted with the straight port cylinder head and 3/8-inch lift cams. Compression ratios of 7:1, 8:1 and 9:1 could be specified according to local fuel quality, the difference being obtained by varying the crown design of the pistons.[3] The engine was fed by just two carburettors and developed a claimed 245 bhp (183 kW; 248 PS) gross at 5,500 rpm,[4] which was 20 bhp (15 kW; 20 PS) less than the triple-carburettor version in the 420G and E-Type. The maximum torque of the engine at 283 lb?Àft (384 N?Àm) was virtually the same as that of the triple-carburettor version yet was achieved at 3,750 rpm rather than 4,000 rpm....
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Submitted by rickr@hydrants.com on Tue, 03/05/2013 - 14:44

Hello George. Thank you for your response. That helps a whole bunch! I've always been confused - till now. I've always felt the interior of the 420G is the most beautiful I've ever seen.
Thanks again for your help. Rick.

Submitted by SE98-32482CJ on Fri, 02/22/2013 - 17:18

Richard the 420 was based on the body shell of the "S" (which was MK2 based itself). The 420 'G' was a model upgrade of the MK 10 and a much larger as well as heavier car. The interior room of a MK10 or 420'G' is massive. I love mine and is one of the few cars a person can rest in the rear seat without pulling your legs up. The 420 "G' was offered in 66 and 67 as well as the 420. Fed. Regs. prevented the cars from meeting 1968 standards plus Jaguar's efforts in 1968 were firmly toward the XJ6 which replaced all sedan models in the US. ZThe 420"G" continued on in the ROW and even soldiered on into the 90s as the basis of the DS420. Hope that helps.