We return to our analysis of the 50-year old Austin and Fiat contemporaries with a look at their engines. One was the work of a revered racing engine designer, the other was cobbled together by two capable engineers in the backrooms of Longbridge under the thumb of an unsympathetic boss with his own peculiar agenda.
On paper a conservative design, the Maxi’s E series engine turns out to be downright odd in its execution. It evolved from a 1300cc prototype with a belt-driven overhead camshaft, one of many experimental designs being developed in the West Works at Longbridge. Long-serving engine designers Eric Bareham and Bill Appleby were handed the task of reworking the inchoate power unit into an engine suitable for BMC’s new mid-range car.
More capacity was needed, so it was bored out to accommodate 3 inch pistons, leaving no space for waterways between bores or any further outward expansion. Issigonis vetoed belt drive for the camshaft in favour of a traditional single-roller chain, on the reasonable grounds that belt technology was new and unproven at the time. Continue reading “128 vs Maxi Part 4: The Racehorse and the Donkey”