Rx-8s are smaller and put out 200+ horses lol
Actually the Rx8 engine is bigger
than the 2.3 and 2.5L engines, and is comparable to 2.6L piston engines that fill the streets.
The inventer of the first Wankel engine decided to ignore many years of convention, when defining the engine's displacement. He based it on:
- the size of the displaced volume in one "chamber" or cylinder (.65L)
- the number of chambers in a rotor housing that fire in one rev (1)
- the number of housings. (2)
disp = .65L/chamber x (1 chambers fired)/(output shaft rev)/ housing x 2 housings
disp = 2 fired chambers per rev
of output shaft.
That gives the current Rx8 engine 1.3L disp in one rev
, based on that clever old dude.
If you use that logic with a 3L V6 engine, with 2 heads:
- a single chamber displaces (.5L)
- number of chambers per head that fire in one revolution (3)
- number of heads (2)
That gives the 3L duratech 1.5L disp in one rev,
based on the Wankel logic.
So to match the chambers fired per rev for a fair comarison of hp output, there are 3 choices:
- rate per wankel logic, in one rev: 6S=1.5L
- rate per 99% of cars on road, in 2 revs: Only wankel changes to 2.6L >Best
- rate per total swept volume. Only wankel changes to 3.8L in 3 revs.
The Wankel engine is exactly like the Otto cycle 4 stroke
engines that dominate the roadways:
intake, compression, power, and exhaust strokes
What makes it unique is
1) No Pistons going up and down. Instead a rotor that rotates on an eccentic "throw" of the crankshaft, at 1/3 crank speed, and has no shocking, reversing direction of motion.
2) the port style intake and exhaust, progressive opening and closing events ... no valves or valve train
3) the chambers are dynamic, vs the commmon head and chamber for normal 4-strokes. The wankel housing has a fixed, rotor TDC position, where the spark plugs are fired. One of the rotor's identical 3 faces define a moving "cylinder" for the compression and expansion strokes.
4) because of the shared combustion chamber (like the pocket in a head), it is the most compact
design for all 4 stroke engines.