Let’s be honest: no one is buying a Chevrolet Silverado HD for performance. These trucks are usually bought by customers who have a heavy trailer to tow, so things like acceleration, top speed and braking distance aren’t as important as items like towing capacity, payload or fuel economy.
That didn’t stop YouTube channel The Fast Lane Truck from comparing the real-world 0-60 mph time of the 2020 Chevrolet Silverado 2500HD with the 6.6-liter L8T V8 to the 2020 Silverado 2500HD with the 6.6-liter L5P Duramax diesel V8, though. While not an important metric in these two workhorses, the channel’s experiment is still quite useful for comparing the actual differences in performance between the two trucks—as horsepower and torque figures on paper don’t always translate into the real world how you might think.
TFL Truck assembled a 2020 Silverado HD Custom with the 6.6-liter gas V8 and a 2020 Silverado HD High Country with the Duramax diesel engine for its comparison test. The gas truck is a little bit lighter, as it’s not as well-equipped and the gas V8 is much lighter than the diesel, but the diesel has much more power and torque. If you need reminding, the L8T V8 is rated at 401 horsepower and 464 pound-feet of torque, while the L5P diesel V8 makes 445 horsepower and a meaty 910 pound-feet of torque.
Another factor affecting the results of TFL Truck‘s test is the transmission. The gas truck is stuck with a GM six-speed automatic, whereas the Duramax gets the much newer and more advanced 10-speed automatic. The location of the test is also a mile above sea level, so TFL Truck‘s results may be a bit faster than if you were at a lower geographic location.
The results? With two-wheel drive mode engaged, the gas truck accelerated from 0 to 60 mph in 9.05 seconds, while the drag from four-wheel drive lowered the time to 9.22 seconds. The diesel truck liked the four-wheel drive high mode a bit more, though, accelerating from 0 to 60 mph in 8.00 seconds with two-wheel drive and 7.90 seconds with four-wheel drive engaged. We expected the diesel truck to be quicker, but were actually impressed with the performance of the much less torque-rich gas truck. Weight is playing a big factor here, as we mentioned above.
Check out the full video embedded below to hear TFL Truck‘s complete impressions of these new heavy-duty Chevys.