Related by context. Frequent words. (Click for all words.) 58 cleanest diesel 55 diesel powered 54 Capstone MicroTurbine 54 diesel powertrains 54 liter turbodiesel engine 54 CFM# engines 53 Selective Catalytic Reduction SCR 53 smog forming pollutants 53 DPFs 53 nitrogen oxide NOx emissions 53 kW/# hp [002] 52 cylinder turbo diesel 52 AuraGen 52 hybrid propulsion 52 Mercedes Benz Actros 52 hydrogen internal combustion 52 urea injection 52 Hybrid Synergy Drive 52 Polo BlueMotion 52 #.# liter Duratorq 52 V6 diesel 52 electric propulsion 51 Optima Hybrid 51 Pentastar V 6 51 #.# liter TDI 51 BMW ActiveHybrid X6 51 GEnx engines 51 turbofan engine 51 8 CYL 51 ASTRA satellite 51 conventional internal combustion 51 Geared Turbofan engine 51 Voltec 51 Multiair 51 smoother quieter 51 cylinder TDI 51 Silverado Hybrid 50 Mercury MerCruiser sterndrives 50 exhaust aftertreatment 50 lightweight composites 50 liter TFSI 50 chassis cabs 50 Dodge Ram Heavy Duty 50 BlueTec 50 diesel particulate filter DPF 50 PACCAR MX engine 50 B# biodiesel [002] 50 variable valve 50 repowered 49 bi turbo 49 Touareg Hybrid 49 cleaner quieter 49 EcoBoost engines 49 reduce NOx emissions 49 MultiJet 49 turbodiesel engine 49 gearless 49 variable geometry turbocharger 49 Ecoboost 49 TDI diesel 49 diesel engines 49 A# spacecraft 49 E# CDI 49 hybrid drivetrain 49 smog forming nitrogen oxides 49 DOHC engine 49 mpg city/# highway 49 6 CYL 49 freight tonnage 49 BMW EfficientDynamics 49 #hp [003] 49 A6 sedan 48 magnetically levitated 48 BLUETEC 48 electric drivetrain 48 Direct Injection 48 Suzuki XL7 48 propulsion motors 48 S# AMG 48 Variable Cylinder Management 48 #.#L diesel 48 #MY [001] 48 turbocharged diesel 48 propane autogas 48 BEVs 48 turbo diesel engine 48 narrowbody aircraft 48 Orion VII 48 #.# liter #PS 48 GEnx engine 48 Efficient Dynamics 48 Daimler Buses 48 BMW xDrive 48 #kVA [002] 48 Prius PHV 48 V6 petrol 48 aerodynamically efficient 47 Jetta SportWagen 47 Audi TDI 47 turbofans 47 Continuously Variable Transmission