Power figures are SAE net unless noted SAE gross, DIN, or JIS. Early (1960 and before) German horsepower figures are almost certainly gross even if not marked as such. American horsepower appears to have gone to net about 1970. Multiplying JIS by .80 or .85 gives SAE net.
Engine capacities are quoted as single chamber capacity. Various
bodies de-rate the RCE by applying coefficients of 1.7, 1.8, 2.0 or
even 3.0 to boost the apparent size.
Geneology of the Rotary engine starting in year 1935 thru current times listed
below, along with horsepower and brief descriptions of cooling systems, purpose
build and displacement.
Eng. Yrs Model cc x rotors Comp BHP/rpm, Torq(lb-ft/rpm)
DKM 32 35 Wankel's first experiment, non-operational
DKM 54 57 experimental 125 x 1 29 hp net at 17,000 rpm
KKM 125 58 (aka KKM 57) 125 x 1 25-30/10-12,000 net
KKM 250 59 exp. auto power 250 x 1 44/9000 gross
KKM 400 60 exp. auto 400 x 1 51/6000 net
KKM 60 60 Mk I exp aircool 60 x 1 3/6000
KKM 60 61 Mk II exper. 60 x 1 6/6000
61 prod. prototype 150 x 1 18/6000 net
KKM 150LI 61 port. fire pump 150 x 1 13.5/6000 net
KKM 2x300 61 295 x 2 = 590 66/6000 net
KKM 500X1 61 exp. 500 x 1 60/6000 net
61 NATO drone x 2
61 motor scooter
KKM 60 62 Mk III exper. 60 x 1 4.2/6500
KKM 507 63 exp. from 500X1 500 x 1 18/5000 net
KKM 509/506 64 exp. 498 x 2 = 996 110/6000 net
KKM 510 64 exp. air cool 215 x 1 10.5/5000 net
KKM 502 62-3 Spider Test 498 x 1 8.6 50/6000 net 52/2500 DIN.
KKM 502 64-67 Spider 498 x 1 = 498 8.6 64/5000, 54/3000 SAE
KKM 512 65 exp., military 498 x 2 = 996 110/6000 net
KKM 514 65-69 exp. air cool 500 x 2 = 1000 35/5000 net. Fr KKM 507
KKM 513 66 exp. liquid cool 500 x 1
KKM 613 66-67 from KKM 612 498 x 1 49/5500 net 51/2745
KKM 612 67-77 Ro80 115hp net 498 x 2 = 996 9.0 129/5800, 112/4500grSAE?
KKM 514 69 exp. air cool 500 x 2 = 1000 46/5000 net
KKM 619 69 x 3 150-180 bhp.
KKM 613 70 Citroën M35 x 1 49/5500 net 51/2745
KKM 622 73 Citr. GS birotor x 2 107 bhp
KKM 871 70-76 in Audi 100 test 750 x 2 = 1500 170 hp
W-87 marine aircool 108 x 1 = 108 8.5 8.7 hp 5800 rpm SAE 64lb
V-87 marine aircool 108 x 1 = 108 8.5 8.7 hp 5800 rpm SAE 68lb
W-120 marine aircool 160 x 1 = 160 8.0 12 hp 4700 rpm SAE 67lb
V-120 marine aircool 160 x 1 = 160 8.0 12 hp 4700 rpm SAE 76lb
H-120 marine aircool 160 x 1 = 160 8.0 12 hp 4700 rpm SAE 85lb
marine "Zisch" 220 KW
DKM 78 82 Wankel Institute 300 x (1?) 300 KW
Audi ~85 Natural Gas stratified charge.
Eng. Yrs Model cc x rotors Comp BHP/rpm, Torq(lb-ft/rpm) 40A 61 experimental 386 x 1 = 386 L8A 62 experimental 399 x 1 = 399 L8A/0353 62 experimental 399 x 2 = 798 L8A/3804 63 experimental 399 x 3 = 1197 L8A/3805 63 experimental 399 x 4 = 1596 160/6000 gross 400/3867 67 experimental 395 x 2 = 790 400/3893 69 experimental 495 x 2 = 990 3912 70 experimental 356 x 1 = 356 35 bhp X002 70 experimental 360 x 1 = 360 3915 70 experimental x 1 = 360? 6A 70s experimental 573 x 1 = 573 from 12A 7A 70s experimental 654 x 1 = 654 from 13B 2002 71 experimental 491 x 4 = 1964 180/6000 (from 10A) 10A/3820 64 prototype 491 x 2 = 982 10A/0810 67 Cosmo L10A 491 x 2 = 982 110/7000 (gross) 10A/0813 68 Cosmo L10B 491 x 2 = 982 128/7000 (gross) 10A/0820 68 Cosmo 491 x 2 = 982 100/7000 (gross) 10A/3883 68 Singapore GPrace 491 x 2 = 982 204 bhp 10A/0820 69-72 Presto (JpnR100) 491 x 2 = 982 100/7000 98/3500 10A/3877 69-72 R100(US) 491 x 2 = 982 100/7000 92/4000 akaM10A 10A/0866 71-5? RX-3(Jpn) 491 x 2 = 982 105/7000 (gross) 10B 68-69 Cosmo 128 (gross) 12A/3830 66 experimental 573 x 2 = 1146 12A/3872 68 prototype 573 x 2 = 1146 12A/3830 66 prototype 573 x 2 = 1146 12A 70-71 R100 573 x 2 = 1146 9.4 100/7000 (gr.), 92/4000 12A 70-71 RX-2 573 x 2 = 1146 9.4 120 (gross) 12A 72 R100 573 x 2 = 1146 9.4 77/6000, 80/4000
12A/3905 72 RX-2 US 573 x 2 = 1146 9.4 102/6800, 98/4000 net 12A/R612 72-75 RX-3 US 573 x 2 = 1146 9.4 90/6000, 96/4000 net 12A 73 Luce GR (Japan) 573 x 2 = 1146 9.4 120/6500, 116/3500 DIN 12A 73 Luce GR AP (Jpn) 573 x 2 = 1146 9.4 115/6500, 114/3500 DIN 12A 73 Luce GR II (Jpn) 573 x 2 = 1146 9.4 130/7000, 120/4000 DIN 12A 73 Luce GR IIAP (J) 573 x 2 = 1146 9.4 125/7000, 117/4000 DIN 12A 73 RX-2 573 x 2 = 1146 9.4 97/6500, 96/4000 12A 73 LeMans race tune 573 x 2 = 1146 250/8000 12A SIP 74 RX-2 573 x 2 = 1146 9.4 97/6500, 96/4000 12A 76 RX-3 Nikki 2bl 573 x 2 = 1146 9.4 95/6000, 102/4000 12A 77-78 RX-3SP 573 x 2 = 1146 9.4 95/6000, 102/4000 12ASport 77 Sports Kit(race) 573 x 2 = 1146 9.4 250+/9000 12A 79-80 RX-7 573 x 2 = 1146 9.4 100/6000, 105/4000 12A Lean 81-85 RX-7 US LeanBurn 573 x 2 = 1146 9.4? 100/6000?, 105/4000? 12A 6PI 82-85 Luce,Cosmo (Jpn) 573 x 2 = 1146 12A/Turb 83-8? Luce,Cosmo,RX-7 573 x 2 = 1146 8.5 160/6000JIS, 165/4000 12A/Turb 8?-85 Luce,Cosmo,RX-7 573 x 2 = 1146 8.5 165/6000JIS, 165/4000 12A 84-85 RX-7 (S,GS,GSL) 573 x 2 = 1146 9.4 101/6000, 107/4000 12B 73-75 racing one distr 573 x 2 = 1146 250+/9500 13A/0823 70-72 R130 front drv 655 x 2 = 1310 9.1 126/6000, 127/3500 13B 73 R130 (Japan) 654 x 2 = 1308 9.1 125/6000, 127/3500 13B 74-75 RX-4 654 x 2 = 1308 9.2 110/6000, 117/3500 13B 76-78 RX-4 654 x 2 = 1308 9.2 110/6000, 120/4000 13B 76-78 RX-5 (Cosmo) 654 x 2 = 1308 9.2 110/6000, 120/4000 13B Race 77 Racing 654 x 2 = 1308 9.4 290+/9000 13B Race 79 Le Mans Racing 654 x 2 = 1308 285/9000 13B Race 80 Le Mans Qualify 654 x 2 = 1308 300 13B Race 80 Le Mans Racing 654 x 2 = 1308 290/8500 13B DEI 83+ Cosmo,Luce,RX-7 654 x 2 = 1308 13B Race 84 Le Mans, factory 654 x 2 = 1308 330 sprint, 310 enduro 13B Turb 84 Racing 654 x 2 = 1308 7.5 500/8000, 326/7500 13B DEI 84-85 RX-7 (GSL-SE) 654 x 2 = 1308 9.4 135/6000, 133/2750 13B DEI 86-89 RX-7 2nd gen 654 x 2 = 1308 9.4 146/6500, 138/3500 13B Turb 86-89 RX-7 Turbo II 654 x 2 = 1308 8.5 182/6500, 183/3500 13B 89 Luce (Japan929) 654 x 2 = 1308 8.5 177/6500, 181/3500 JIS 13B VDEI 89-92 RX-7 Light Rotor 654 x 2 = 1308 9.7 160/7000, 140/4000 13B Turb 89-91 RX-7 T II Lt Rtr 654 x 2 = 1308 9.1 200/6500, 196/3500 13B Twin 92+ RX-7 Seq. Turbo 654 x 2 = 1308 9.0 255/6500, 217/5000 MSPRE 95+ RX-01 MulSidPrt x 2 220/8500, 159/6500 13G racing x 3 13J racing x 3? 4? 15A 73 experimental 737 x 2 = 1474 135/5750gross, 145/3500 84/5 MX-03 (exp) 654 x 3 = 1962 320/7000 JIS, 290 lbft 20G x 3 21A R-II 72 experimental 1046 x 2 = 2092 (22A 2x1169cc planned) R26B racing 448 lb-ft 654 x 4 = 2616 700/9000 62mkg/6500 ROSCO 70s proposed stratified charge, late 70s SCP proposed precombustion chamber engine TISC experimental supercharged DISC 80s late 80s DISC-II 90s early 90s Miller 90s Miller Cycle RCE HR-X exp. hydrogen HRX-2 exp. hydrogen RE10X 80s exp. alloy small cap. for MX-04 show car (Miata precursor)