1450 (or 1460) is just a stroked 1380 though, so for low volume production it feasible, especially where they’re obviously not looking to keep costs down.
Without doing the maths, they may have gone 73mm bore to keep that little bit more between the bores and give the head gasket more chance, and then stroked to 86mm.
Had they invested in a modern production of at that time for their engines, would it have been within BMC's capability to produce a road-going ADO16 / 1275 GT spec 1440 via a 73mm bore x 86mm stroke or would the 1440 be limited-production as was the case with the homologation 970-1275 Cooper spec engines of the 1960s to early-1970s?
It would certainly display the A-Series had a bit more scope for growth in displacement than previous thought possible, with a number roughly placing road-going ADO16 / 1275 GT spec feasible limit at 1381 via 71.5mm bore x 86mm stroke.
Edited by Mite, 15 July 2021 - 11:56 PM.
