Are large gas motor Rv's underpower?
At the risk of getting someone angry for me asking the same question they don't want to see again, that no doubt some people feel has been discussed enough. Are gas Class A's underpowered to tow a...
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Pounds per horsepower determines acceleration and speed climbing hills. Many A gassers are at 50 pounds/hp or less, the heaviest are just under 100 pounds/hp at full GCWR, rig and heaviest allowable tow.
Small DPs (especially the older ones with 300 hp or less) are often just over 100pounds per HP, and most manufacturers tend to increase power with upgrades in size and weight ratings to stay slightly better than that figure.
Compared to your typical passenger cars and SUVs at 18 to 30 pounds per hp, all RVs are underpowered. Compared to 120,000 pound over the road trucks with 200 pounds per HP, RVs are not particularly underpowered.
People who like diesels like that they generate high torque at low RPM, so they don't need to run at high rpm to get the same power and torque at the drive wheels, which is the place where torque needs to be measured, for comparisons.
Small DPs (especially the older ones with 300 hp or less) are often just over 100pounds per HP, and most manufacturers tend to increase power with upgrades in size and weight ratings to stay slightly better than that figure.
Compared to your typical passenger cars and SUVs at 18 to 30 pounds per hp, all RVs are underpowered. Compared to 120,000 pound over the road trucks with 200 pounds per HP, RVs are not particularly underpowered.
People who like diesels like that they generate high torque at low RPM, so they don't need to run at high rpm to get the same power and torque at the drive wheels, which is the place where torque needs to be measured, for comparisons.
