Compressed Natural Gas (CNG) is a clean burning alternative fuel that is available as an option with many pickups, vans, and larger commercial vehicles.
TFLtruck recently caught these Ram 2500 HD pickups testing at high altitude of Colorado Rocky Mountains. The CNG version of the Ram 2500 HD has been around since 2012, so it’s not immediately clear why these trucks are being tested now. Perhaps, these is an upgrade to the powertrain or additional requirements that necessitate emissions calibration?
The current Ram HD CNG is using a 5.7L HEMI V8 that is rated at 383 hp and 400 lb-ft of torque. This is the same rating as a regular Ram HD. The additional CNG system makes is a dual-fuel truck. Fuel delivery is automatic and requires no driver input. The truck can run either on gasoline or on CNG. It’s equipped with dual 18-gallon (gas equivalent) CNG tanks. A single 8-gallon unleaded gasoline tank is standard and provides a total estimated dual-fuel range of 367 miles. The optional 32-gallon gas tank providing estimated 703 mile of range.
TFLtruck test a 2014 Ford F-150 with dual-fuel CNG system. We found it to be less powerful and efficient when running of natural gas. The Ford had a switch for switching between the two fuel sources.