A midsize car, also referred to as an intermediate car, is a sedan that offers more space than a compact while still being very fuel efficient. An example of a midsize car rental is a Hyundai Elantra.

In the car rental industry of 2026, midsize and intermediate are generally used interchangeably to describe the same class of vehicle. This category sits comfortably between "Compact" and "Standard" or "Full-Size" models. In North America, rental agencies like Avis and Enterprise often list them together, featuring models such as the Toyota Corolla, Hyundai Elantra, or Nissan Sentra. These vehicles typically accommodate up to five passengers and provide enough trunk space for one large suitcase and two smaller bags. While the terminology is identical in most U.S. contexts, European and Asian markets may use "Class D" or "Mid-Size" to denote the same footprint. Choosing this category is often considered the "sweet spot" for travelers, as it offers a smoother suspension and more legroom than a compact car without the significantly higher fuel consumption and parking challenges associated with full-size sedans or large SUVs.