In the world of heavy-duty trucks, horsepower and torque are kings. All three Detroit automakers are continuously one-upping each other in that regard, each becoming more and more capable with every passing model year, refresh, or redesign. As Ford Authority reported last week, General Motors was recently spotted benchmarking a Ford Super Duty F-350 equipped with FoMoCo’s 6.7L Power Stroke V8 diesel that produces 475 horsepower and 1,050 pound-feet of torque. Now, GM Authority is reporting that the 2023 GM HD lineup is aiming to trump those numbers.
The GM HD lineup – which consists of the Chevy Silverado HD Duramax and GMC Sierra HD Duramax – is rumored to be receiving some updates that will boost output to 505 horsepower and 1,085 pound-feet of torque, which would best Ford’s Power Stroke diesel by 30 horsepower and 35 pound-feet of torque, as well as the 2021 Ram HD 3500 equipped with the 6.7L Cummins turbo-diesel inline-six, which produces 420 horsepower and 1,075 pound-feet of torque, by a healthy margin.
|Vehicle||Engine||Fuel Type||Aspiration||Valvetrain||Horsepower (hp @ rpm)||Torque (lb-ft @ rpm)|
|2021 Chevy Silverado HD||6.6L L8T V8||Gasoline||Atmospheric||OHV 16-valve||401 @ 5,200||464 @ 4,000|
|2021 Chevy Silverado HD||6.6L Duramax L5P V8||Diesel||Turbocharged||OHV 32-valve||445 @ 2,800||910 @ 1,600|
|2021 Ford Super Duty||6.2L Boss V8||Gasoline||Atmospheric||SOHC 16-valve||385 @ 5,750||430 @ 3,800|
|2021 Ford Super Duty||7.3L Godzilla V8||Gasoline||Atmospheric||OHV 16-valve||430 @ 5,500||475 @ 4,000|
|2021 Ford Super Duty||6.7L Power Stroke Scorpion V8||Diesel||Turbocharged||DOHC 32-valve||475 @ 2,800||1,050 @ 1,600|
|2021 GMC Sierra HD||6.6L L8T V8||Gasoline||Atmospheric||OHV 16-valve||401 @ 5,200||464 @ 4,000|
|2021 GMC Sierra HD||6.6L Duramax L5P V8||Diesel||Turbocharged||OHV 32-valve||445 @ 2,800||910 @ 1,600|
|2021 Ram HD||6.4L HEMI V8||Gasoline||Atmospheric||OHV 16-valve||410 @ 5,600||429 @ 4,000|
|2021 Ram HD||6.7L Cummins I6||Diesel||Turbocharged||OHV 24-valve||370 @ 2,800||850 @ 1,700|
|2021 Ram HD||6.7L Cummins I6 HO||Diesel||Turbocharged||OHV 24-valve||420 @ 2,800||1,075 @ 1,800|
Currently, GM’s 6.6L V8 L5P turbodiesel Duramax is rated to produce 445 horsepower and 910 pound-feet of torque, so these rumored power figures represent a significant increase of 60 horsepower and 175 pound-feet over the current model. GM’s HD lineup is also available with the naturally aspirated 6.6L L8T gasoline engine, which produces 401 horsepower and 464 pound-feet of torque. Both of these engines are expected to receive updates for the 2023 model year as part of a mid-cycle refresh, but it’s possible the chip shortage pushes them back to the 2024 model year.
Meanwhile, as Ford Authority reported last week, the Ford Super Duty lineup is currently scheduled to receive a redesign in 2023 following the model’s refresh for the 2020 model year. In the meantime, the 2022 Super Duty comes equipped with a host of upgrades, including an available 12-inch center touch screen, SYNC 4, a new Lariat Sport Appearance Package, Black Appearance Package for XLT models, and new exterior and interior colors.