[Phlyer]

There was some variation, but the typical Packard Merlin was 1620 cu. in, which equates to 26.5 liters, so they were actually fairly close.

Just for the record, a standard Elco PT boat had three, not four of them. Not that it really matters - even one of them is serious power!

[tophat9000]

I just looked up the PT boat Packard were a modified aircraft engine but not RR Merlins but an earlier engine from the 30’s.. which would makes sense in Packard were making the PT boat Engines before the got the deal to make RR Merlin...

The Merlin was 1650 Cubic inch, the PT boat Packard were 2490 Cubic inch