When we compare the 2021 BMW M4's and the 2021 Porsche 911's specifications and ratings, the 2021 BMW M4 has the advantage in the areas of typical lower range of pricing for used cars, interior volume and base engine power. The 2021 Porsche 911 has the advantage in the areas of fuel efficiency, reliability, resale value and overall quality score. Based on this comparison of the 2021 BMW M4's and the 2021 Porsche 911's specifications and ratings, the 2021 Porsche 911 is a better car than the 2021 BMW M4.
2021 BMW M4 vs. 2021 Porsche 911 Pricing
A used 2021 BMW M4 ranges from $66,991 to $80,969 while a used 2021 Porsche 911 is priced between $113,992 to $252,180.
2021 BMW M4 vs. 2021 Porsche 911 Resale/Retained Value
Looking at the 5-year depreciation rate for both models, the 2021 BMW M4 loses 38.4 percent of its value and the 2021 Porsche 911 loses 15.2 percent of its value. This means the 2021 Porsche 911 retains 23.2 percentage points more of its value and has the advantage of higher resale value versus the 2021 BMW M4.
2021 BMW M4 vs. 2021 Porsche 911 Quality Rating
The iSeeCars Overall Quality rating for the BMW M4 is 7.3 out of 10 while the Porsche 911's quality rating is 8.5 out of 10. This results in the BMW M4 being ranked 9 out of 21 Best Luxury 2-seater Cars and the Porsche 911 being ranked 1 out of 21. Out of 40 Best Luxury Sports Cars, the BMW M4 is ranked 18 and the Porsche 911 is ranked 1. The BMW M4 is also ranked 18 out of 33 Best Luxury Coupes while the Porsche 911 is ranked 2 out of 33.
2021 BMW M4 vs. 2021 Porsche 911 Reliability Rating
iSeeCars’ Reliability Rating for the BMW M4 is 7.2 out of 10. For the Porsche 911 the reliability rating is 7.8 out of 10. This gives the Porsche 911 a slight advantage in reliability compared to the BMW M4.
Engine Power and Fuel Efficiency Comparison
For engine performance, the 2021 BMW M4’s base engine makes 473 horsepower, and the 2021 Porsche 911 base engine makes 379 horsepower. The M4 is rated to deliver an average of 19 miles per gallon, with a highway range of 359 miles. The 911 is rated to deliver an average of 20 miles per gallon, with a highway range of 406 miles. This gives the 2021 Porsche 911 the fuel efficiency and maximum range advantage over the 2021 BMW M4. Both models use premium unleaded.
Passenger Space Comparison
While both models are sports cars, the 2021 BMW M4 has the advantage of offering more interior volume, reflected in more cargo space.