4a-c compression ratio? - Toyota Nation Forum : Toyota Car and Truck Forums

O 16581 72452 5 · 03-16-2004, 06:02 PM

I've browsed around google and other forums and cannot find the compression ratio of the engine, does anyone know?

|PuNiSh3R| · 03-16-2004, 06:35 PM

You can calculate it if you know the factory compression I do believe.. or maybe it's a combination of stroke and compression.. idk I'm guessing something like 9.5:1 but that's just a guess going on the CR of the 4AGE and 4AFE's

YotaRolla74 · 03-20-2004, 02:19 PM

Or you could obtain a car manual (haynes/chiltons) and it will tell you in there.

donna · 03-21-2004, 07:59 AM

my haynes claims
1987 4a-c,4a-lc compression ratio of 9.0:1
in glossery it says "the comparison of the total volume of the cylinder and combustion chamber with the piston at BDC and the piston at TDC."