Actual Rotary Displacement Request

t_g_farrell · 06-01-2011, 08:48 AM

I'm going to offer a non-techincal reason for why mazda and various other
makers of rotary products quote displacement the way they do. For the Mazda
case it makes all the 2 rotor engines less that 2 liters in displacment. From a
marketing perspective this is a big win especially in Europe and Japan where
heavy taxes get levied for anything over 2 liters.

I think trying to compare a rotary by displacement to a piston is a mistake
because they are so different in how they behave as they develop power.
I think the only way to compare them is by power and torque. A 13B is
very similiar in power to a 6 cylinder except that the torque is low at low rpms.

I'm talking a stock NA sort of 13B. I know if you slap a turbo on it and stuff
its a v8 killer but thats a whole different animal.

06-01-2011, 08:48 AM	#9
t_g_farrell Waffles - hmmm good Join Date: Aug 2008 Location: Huntersville, NC Posts: 757 Rep Power: 0	I'm going to offer a non-techincal reason for why mazda and various other makers of rotary products quote displacement the way they do. For the Mazda case it makes all the 2 rotor engines less that 2 liters in displacment. From a marketing perspective this is a big win especially in Europe and Japan where heavy taxes get levied for anything over 2 liters. I think trying to compare a rotary by displacement to a piston is a mistake because they are so different in how they behave as they develop power. I think the only way to compare them is by power and torque. A 13B is very similiar in power to a 6 cylinder except that the torque is low at low rpms. I'm talking a stock NA sort of 13B. I know if you slap a turbo on it and stuff its a v8 killer but thats a whole different animal. __________________ 1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs Project Fat Nikki Budget 12A rebuild Video setup < $30.00