The biggest RVs on offer, these are in the 24-to-40-foot range and are built on a heavy-duty commercial truck or bus chassis. Class A RVs often feature a bedroom, bathroom, kitchen and dining area ...

Because of this, the Class As are a popular choice for people who want a luxuriously large RV for full-time living on the road, according to General RV. Class B: the smallest RV.

In most Class A gas RVs, a Ford 7.3-liter V-8 sits directly below the driver’s right ear. Harbinger’s chassis packages the engine behind the rear axle, some 15 feet behind the driver.

Add to these pairs of Thor Class B camper vans the 22-foot (actually 21-feet, 1-inch) Dazzle and Twist ProMaster 3500, both coming in at a downright respectable entry point of $118,860.

Visually similar to Thor’s existing Vegas Class A motorhome and co-developed by Thor and commercial EV manufacturer Harbinger, this “world’s first hybrid RV” combines a gas-powered range ...