So is a 2054 a stroker motor.
Yes. It is both a “big bore” and “stroker” engine (or “bored and stroked”).
Sometimes anything larger than a stock displacement is referred to as a “stroker,” but technically speaking you can have “big bore” engines that are not “strokers”, and vice versa.
For example the stock stroke on a 1600 engine is 69mm, and the stock bore for the piston size is 85.5mm. A 1914 would technically be a “big bore” engine since its displacement has been increased by boring it out for a larger piston size, but would not be a “stroker” since it retains the stock crank stroke of 69mm. So a 1914 is really a “big bore” 1600.
On the flip side a popular 36hp upgrade is installing the 69.5mm crank and hi-po cam into an otherwise stock engine (stock being 77mm pistons and 64mm crank). It’s technically a “stroker” since it’s displacement has been increased due to the longer crank throw (stroke), but is not a “big bore” since the piston size remains stock.
