If you're looking for a stylish set of wheels to hit the roads of Rochester Hills, Oakland Township, or Sterling Heights, MI, then you may be looking at the 2021 BMW 3 Series or 2021 BMW 4 Series.

Both vehicles pack a punch and provide a luxurious ride. However, here at BMW of Rochester Hills, we are going to compare the BMW 3 Series vs. BMW 4 Series and see which vehicle works best for different types of drivers.

Ready for an adventure? Then, buckle up and let's get started.

BMW 3 Series vs BMW 4 Series: Performance and MPG

When it comes to power, both are well equipped. They share the same standard 2.0L BMW TwinPower Turbo 4-cylinder engine that boasts a roaring 255 horsepower.

Additionally, the BMW 3 Series and BMW 4 Series share similar performance features, including:

  • Auto Start-Stop function
  • Electronic throttle control
  • 8-speed Sport Automatic transmission
  • Driving Dynamics Control with selectable drive modes

Though both are incredibly powerful and capable, they don't compromise on fuel efficiency. Let's look at the EPA-estimated fuel economy for both vehicles:

2021 BMW 3 Series

2021 BMW 4 Series

26 city MPG1

26 city MPG1

36 highway MPG1

34 highway MPG1

30 combined MPG1

29 combined MPG1

When it comes to performance, both sedans provide a peppy and nimble drive. Additionally, with excellent fuel economy, you can go the distance with the BMW 3 Series and BMW 4 Series without the need for frequent fuel stops.

You can't go wrong with either set of wheels.

BMW 3 Series vs BMW 4 Series: Interior Dimensions

For starters, the 4 Series is a coupe, and the 3 Series is a sedan. This makes for a slight difference in size, inside and out. Since the 4 Series is a 2-door, you have seating for up to four. In the 3 Series, you have seating for up to five.

However, depending on your needs, the extra seat may not matter. Though both vehicles are compact, they still offer plenty of space with about 38 inches of front headroom in both vehicles.

Additionally, if you want to haul some groceries or bags for a weekend getaway, the 4 Series offers 12 cubic feet of cargo space, while the 3 Series offers 13 cubic feet.

If you have a family or enjoy having the extra seat, then the 3 Series provides more space overall.

BMW 3 Series vs BMW 4 Series: Exterior Design

Though both vehicles have many similarities on the inside, they differ drastically on the outside. The BMW 3 Series provides a softer, sleeker exterior around the hood and headlights.

When it comes to the BMW 4 Series, you get a sportier, slightly more futuristic design with a new honeycomb grille that adorns the front of the vehicle. The grille also moves down the whole front bumper, creating an eye-catching and unique design.

Of course, both BMWs look amazing, so you can't go wrong. However, if you want a sportier look, it may be best to opt for the 4 Series.

If a simpler design strikes your fancy, then the BMW 3 Series is the way to go.

Test Drive the BMW 3 Series and BMW 4 Series Today!

Still can't decide between these two vehicles? We don't blame you. That's why at BMW of Rochester Hills, you can get behind the wheel of the BMW 3 Series and BMW 4 Series for your drives around Rochester Hills, Oakland Township, and Sterling Heights, Michigan.

Contact us today to schedule a test drive!

1 Preliminary EPA-estimated figures are for comparison purposes only. Your actual mileage will vary, depending on speed, driving habits, trip length and driving conditions; actual mileage may be lower. Note for MPGe: All data are provisional and subject to official confirmation. The provisional power consumption figures have been calculated based on the ECE test cycle.

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BMW of Rochester Hills

45550 Dequindre Rd
Directions Shelby Township, MI 48317

  • Sales: (888) 294-1015
  • Service: (248) 997-7700
  • Parts: (248) 997-7700


  • Monday 9:00AM-8:00PM
  • Tuesday 9:00AM-6:00PM
  • Wednesday 9:00AM-6:00PM
  • Thursday 9:00AM-8:00PM
  • Friday 9:00AM-6:00PM
  • Saturday 10:00AM-4:00PM
  • Sunday Closed