Shortround6
Major General
The crankcase designs do look different. The Cirrus doesn't have the piece that holds the propshaft/crankshaft and uses a different top cover. The Cylinder bolts on the Tigre don't look like they are through bolts. (Head to crankcase)
But when you have four 120 X 140 mm cylinders and the engines make within 5-10hp of each other within about 100rpm of each other?
Over the years there was some juggling of fuel and compression ratios.
But when you have four 120 X 140 mm cylinders and the engines make within 5-10hp of each other within about 100rpm of each other?
Over the years there was some juggling of fuel and compression ratios.
