A Quiet One Among Performance Cars - 2015 BMW M235i Convertible Long-Term Road Test

2015 BMW M235i Convertible Long-Term Road Test

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2015 BMW M235i: A Quiet One Among Performance Cars

by Mike Schmidt, Vehicle Testing Manager on October 15, 2015

2015 BMW M235i

Recently there's been some discussion as to how quiet our 2015 BMW M235i is, or is not, during everyday conditions. James complimented its interior sound levels at highway speeds and Mike felt the cabin was too loud at idle.

It seemed like a good opportunity to dust off some test data and compare the M235i with other recently tested convertibles.

 

@ idle (dB):

@ Full Throttle (dB):

@ 70 mph cruise (dB):

@ 70 mph top down (dB):

@ 70 mph (rpm):

2014 Mercedes-Benz E400 Cabriolet

40.7

70.1

63.0

74.3

1800

2015 Audi A3 Cabriolet

42.8

70.9

66.9

68.4

2000

2014 Volkswagen Beetle Cabriolet

43.8

73.0

67.1

75.0

2300

2015 BMW M235i Convertible

43.1

79.5

66.2

74.1

2000

2015 Ford Mustang Ecoboost Convertible

46.0

79.0

66.0

76.0

2000

2014 Infiniti Q60 Convertible

48.4

77.4

66.4

84.9

2250

2015 Ford Mustang GT Convertible

51.2

79.7

68.6

78.7

1900

The list is in order with the quietest vehicle at the top based on average decibel readings for the categories we record. This should give a general idea of where the M235i ranks within a wide range of convertibles. It is not an absolute quiet-equals-bad scale.

For instance, the BMW is second-loudest at full throttle. That's because it sounds fantastic. Otherwise, it's one of the quieter on this list, despite its emphasis on performance.

Does anything about these figures stand out to you?

Mike Schmidt, Vehicle Testing Manager

  • Full Review
  • Pricing & Specs
  • Road Tests (1)
  • Comparison
  • Long-Term

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