What The Dynomometer Tells Us
3.7-liter: V-6 The peaks and dips in the 3.7-liter V-6's torque curve were consistent in every dyno run. Torque peaked initially at 2400 rpm, then fell off and began climbing again to another peak at 4200 rpm. While previous engines would produce peak torque and then fall off, Ford's extra efforts in variable valve timing, Ti-VCT, has made the engine more efficient across the rpm range.
5.0-liter: V-8 As on the 3.7-liter V-6, the use of Ti-VCT spreads out the torque curve. While smoother on the V-8, definite peaks are apparent on the graph; unlike with the V-6, they are barely noticeable in real-world driving. While not the fastest truck in the test, the quickly climbing power curve makes it feel fast on the street. Downside is the need for higher-rpm operation when towing.
EcoBoost: The dyno doesn't provide enough resistance to get a realistic torque reading at the low end of the chart. The EcoBoost can accelerate past 2000 rpm before the turbos are producing full boost. On the road, with more resistance, the truck would likely produce more torque than indicated below 2000 rpm. The later spool-up also means less heat in the beginning of the dyno run, so the torque beyond that point might be slightly inflated.
6.2-liter: V-8 Based on a different, older family of engines than the 5.0-liter V-8, power and torque curves are nearly identical in shape on the 6.2-liter, just farther up the graph. Torque builds quickly below 3000 rpm, levels out, then starts to run up again up to a peak at 4500 rpm. On dyno and road, the V-8's behavior could be called angry. While EcoBoost and Coyote V-8 are silky smooth, the boss wants to jump out of the truck and bite someone at wide open throttle.
Torque: As you can see here, the torque curves for all four engines are fairly flat. The EcoBoost has the best of all worlds: flat curve, most torque, and lowest rpm at which peak torque was achieved.
Horsepower: EcoBoost engine had most power on the dynomometer, followed closely by the 6.2L, then the 5.0L, with the 3.7L closing.