2020 BMW Z4 vs. 2020 Audi A5

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/06/06

The Z4’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The A5 doesn’t offer a driver alert monitor.

Both the Z4 and the A5 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, rear parking sensors and rear cross-path warning.

Warranty

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BMW pays for scheduled maintenance on the Z4 for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Audi only pays for the first scheduled maintenance visit on the A5.

There are over 14 percent more BMW dealers than there are Audi dealers, which makes it easier should you ever need service under the Z4’s warranty.

Reliability

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To reliably start during all conditions and help handle large electrical loads, the Z4 has a standard 800-amp battery (900 M40i). The A5’s 420-amp battery isn’t as powerful.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Audi vehicles. J.D. Power ranks BMW 20th in initial quality. With 4 more problems per 100 vehicles, Audi is ranked 22nd.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Audi vehicles. J.D. Power ranks BMW 7th in reliability, above the industry average. With 2 more problems per 100 vehicles, Audi is ranked 8th.

Engine

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The Z4 sDrive30i’s standard 2.0 turbo 4-cylinder produces 7 more horsepower (255 vs. 248) and 22 lbs.-ft. more torque (295 vs. 273) than the A5’s 2.0 turbo 4-cylinder. The Z4 M40i’s standard 3.0 turbo 6-cylinder produces 134 more horsepower (382 vs. 248) and 95 lbs.-ft. more torque (368 vs. 273) than the A5’s 2.0 turbo 4-cylinder.

As tested in Motor Trend the Z4 M40i 3.0 turbo 6-cylinder is faster than the Audi A5:

Z4

A5

Zero to 60 MPH

3.9 sec

5.2 sec

Quarter Mile

12.4 sec

13.8 sec

Speed in 1/4 Mile

112 MPH

100.5 MPH

Fuel Economy and Range

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On the EPA test cycle the Z4 sDrive30i gets better fuel mileage than the A5 Cabriolet Auto (24 city/32 hwy vs. 23 city/31 hwy).

Environmental Friendliness

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In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the BMW Z4 higher (5 to 7 out of 10) than the Audi A5 (3). This means the Z4 produces up to 24.5 pounds less smog-producing pollutants than the A5 every 15,000 miles.

Transmission

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An eight-speed automatic is standard on the BMW Z4, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the A5.

Brakes and Stopping

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For better stopping power the Z4 M40i’s brake rotors are larger than those on the A5:

Z4 M40i

A5

Front Rotors

13.7 inches

13.3 inches

Rear Rotors

13.6 inches

13 inches

The Z4’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the A5 are solid, not vented.

The Z4 stops much shorter than the A5:

Z4

A5

60 to 0 MPH

99 feet

117 feet

Motor Trend

Tires and Wheels

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For better traction and acceleration, the Z4 has larger standard rear tires than the A5 (255/40R18 vs. 245/40R18). The Z4’s optional rear tires are larger than the largest rear tires available on the A5 (275/35R19 vs. 255/35R19).

Suspension and Handling

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The Z4 offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The A5’s suspension doesn’t offer adjustable shock absorbers.

For better handling and stability, the average track (width between the wheels) on the Z4 is .9 inches wider in the front and 1.3 inches wider in the rear than the track on the A5.

For better maneuverability, the Z4’s turning circle is 1.7 feet tighter than the A5’s (36 feet vs. 37.7 feet).

Chassis

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The BMW Z4 may be more efficient, handle and accelerate better because it weighs about 350 to 500 pounds less than the Audi A5.

The Z4 is 1 foot, 2.2 inches shorter than the A5, making the Z4 easier to handle, maneuver and park in tight spaces.

Cargo Capacity

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The Z4 has a much larger trunk with its top down than the A5 Cabriolet with its top down (9.9 vs. 7.2 cubic feet). The Z4 has a larger trunk than the A5 Cabriolet with its top up (9.9 vs. 9.3 cubic feet).

Ergonomics

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The Z4 offers a remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The A5 doesn’t offer a remote starting system.

Unlike the driver-only memory seat and mirrors optional at extra cost in the A5, the Z4 has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.

If the windows are left open on the Z4 the driver can close them all from a distance using the remote. On a hot day the driver can also lower the windows the same way. The driver of the A5 can’t use the remote to operate the windows.

In case of a sudden change of weather, the Z4 offers an optional remote convertible top that can be raised from a distance to protect the interior of the vehicle from damage. The A5 doesn’t offer a remote top, so the driver will have to run to the car, get in, turn the ignition on and raise the top to prevent the interior from being damaged.

To help drivers see further while navigating curves, the Z4 offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The A5 doesn’t offer cornering lights.

Recommendations

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/06/06

Consumer Reports® recommends the BMW Z4, based on reliability, safety and performance.

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