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This year’s winners:
- 3.0L TFSI Supercharged DOHC V-6 (Audi S5)
- 2.0L N20 Turbocharged DOHC I-4 (BMW 328i)
- 3.0L N55 Turbocharged DOHC I-6 (BMW 135is coupe)
- 3.6L Pentastar DOHC V-6 (Ram 1500)
- 2.0L EcoBoost DOHC I-4 (Ford Focus ST/Taurus)
- 5.8L Supercharged DOHC V-8 (Ford Shelby GT500)
- 2.0L Turbocharged DOHC I-4 (Cadillac ATS)
- 2.4L DOHC I-4 (Honda Accord Sport)
- 3.5L SOHC V-6 (Honda Accord)
- 2.0L FA DOHC H-4 Boxer (Subaru BRZ)
Source: http://wardsauto.com/vehicles-amp-technology/2013-ward-s-10-best-engines-showcase-efficiency-gains