2021 Ram 1500 TRX stripped on the test bench, developing 583 hp on the rear wheels


The 2021 Ram 1500 TRX Comes in at 702 horsepower and 650 lb-ft of torque, but that’s measured on the crank, not the wheels. Hennessey Performance Engineering tried to measure how much power the TRX was producing on the wheels by stripping one to a dyno, but only ran numbers for the rear wheels.

The bench test showed 538 horsepower and 570 lb-ft of torque on the rear wheels. This corresponds to a drive train loss of around 17%, which is not unusual for a pickup. Hennessey previously recorded a 20% driveline loss to the rear wheels when testing a 2019 Ford F-150 Rtor.

The TRX is full-time all-wheel drive, so you might be wondering how Hennessey got dyno results for just the rear wheels. Company founder John Hennessey said Motor Authority This four-wheel drive was temporarily disabled by disconnecting the front drive shaft.

2021 Hennessey Mammoth 1000 1500 TRX

2021 Hennessey Mammoth 1000 1500 TRX

While the TRX was designed for off-roading, the power of its 6.2-liter Hellcat V-8 compressor makes this truck pretty quick on the sidewalk. Ram says it will do 0-60 mph in 4.5 seconds.

Inevitably, that wasn’t enough for Hennessey. The company has developed more powerful versions from any Hellcat powered vehicleand the same goes for the TRX. Called the Mammoth 1000Hennessey claims the TRX will produce 1,000 horsepower, travel between 0 and 60 mph in 3.2 seconds, and cover the quarter mile in 11.4 seconds.

To achieve those numbers, Hennessey plans to equip the Mammoth 1000 with an upgraded supercharger, pulley and air intake, stainless steel manifolds, high flow exhaust lines (while keeping the catalytic converter), and a new engine mping. The price for the full truck is $ 135,350, and Hennessey only plans to build 200 this year.

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