Related by context. Frequent words. (Click for all words.) 75 internal combustion engine 71 electric motor 67 internal combustion 66 combustion engines 65 internal combustion engines 62 electric motors 60 hybrid powertrain 59 electric powertrain 56 diesel engine 56 turbocharging 56 electrically driven 54 turbocharger 54 diesel engines 54 electric propulsion 54 manual gearbox 53 regenerative braking 53 exhaust emissions 53 turbo lag 53 diesels 52 rotary engine 52 BMW #d 52 hydraulic pump 52 hydrogen 52 diesel powered 52 PHEVs 51 V6 engines 51 particulate filter 51 turbocharged engine 51 Ampera 51 turbo diesel 51 combustion 51 naturally aspirated 51 powerplants 50 Lithium ion battery 50 hydrogen fuel 50 diesel 50 turbodiesel 50 driveability 50 electrically powered 50 EVs 50 TFSI 49 alternator 49 nonpolluting 49 PHEV 49 turbos 49 Tesla Roadster 49 V8 engine 49 Volt 49 fossil fuels 49 hydrogen powered 49 drivetrain 49 lithium ion battery 49 CT #h 49 #.#L engine 49 liter V# 48 lithium polymer battery 48 cylinder engine 48 conventionally powered 48 kW/# hp [001] 48 torque converter 48 turbo 48 V6 engine 48 combustion chamber 48 #g/km [001] 47 hybrids 47 drivability 47 automatic gearbox 47 supercharger 47 torque 47 catalytic converter 47 Camry Hybrid 47 electric hybrid 47 V# engine 47 powerplant 47 #.#L V6 47 hybrid electric 47 zero emission 47 #.# liter V8 47 exhaust gases 47 Toyota Prius hybrid 47 hybrid 46 Civic Hybrid 46 electrics 46 hybrid propulsion 46 ultracapacitors 46 engines 46 motors 46 RX #h 46 normally aspirated 46 HEVs 46 electric 46 cc engine 46 wall socket 46 engine 45 Toyota Prius 45 drivetrains 45 volt outlet 45 powertrains 45 cylinder diesel 45 propulsion 45 Escape Hybrid