How many cubic inches was the Pontiac astra engine?
The original engine was 2.3 liters or 140 cubic inches. It also occasionally came with the 2.5 liter "iron duke" engine at 151 cubic inches. Most of the specifications are the same as the Chevy Vega of that era.
Cubic inches of displacement in reference to a car is the volume of the cylinders in the engine in cubic inches. In most American muscle cars, part of the name refers to the displacement of the engine in cubic inches, for example the Chevrolet Chevelle SS454 has a 454 ci engine and the Oldsmobile 440 had a 440 ci engine.