The performance specifications for the Dodge 4.7-liter gas engines and the diesel engines used in Dodge vehicles as of 2015 are considerably different. Dodge's 4.7-liter PowerTech V8 gas engines have superior peak horsepower versus comparable diesel engines, while diesel motors have superior peak torque and fuel efficiency statistics.
The 4.7-liter PowerTech V8 engine used in the Ram 1500 line of pickup trucks produces 310 horsepower at 5650 RPM, as reported by automotive website Edmunds. This engine produces a peak torque of 330 foot-pounds at 3950 RPM. It is estimated to consume 1 gallon of gas per 14 miles in city driving or per 20 miles in highway driving by the Environmental Protection Agency.
No 4.7-liter diesel engine was offered by Dodge. The most comparable diesel engine to the 4.7-liter gas engine is the V6 EcoDiesel offered as an alternative to the V8 PowerTech engine in the Ram 1500 series. This engine produces 240 horsepower at 5950 RPM and 420 foot-pounds of torque at 2000 RPM, as reported by review site Car and Driver. The EcoDiesel engine achieves fuel consumption of 20 miles per gallon in the city and 27 miles per gallon in highway driving, according to the Enviornmental Protection Agency.