The
A10 Engine was the beginning of the A-series dynasty, so the beginning of the high-performance small Datsun engine. In the 1966 Datsun 1000 it was a revelation, a smooth high-revving powerplant.
At first glance it looks the same as the early A12 block, but it has 3 main differences:
* 3-bearing crankshaft rated at 6,000 rpm. The A12 has a stouter 5-bearing crank and can rev much higher (the GX was rated at 6400 rpm). But with the A10's very short 59mm stroke it doesn't vibrate much
* Deck height: 10mm shorter than A12. It has the shortest deck (the A12 is a full 10mm taller), so therefore the lightest weight
* No provision for positive crankcase ventilation