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The Corvette has standard tall side airbags which act as a forgiving barrier between the driver and outboard passenger's upper bodies and the window and pillars. Combined with high-strength steel door beams and lower side airbags this system increases head protection in broadside collisions. The Z4 doesn't offer side airbag protection for the head.
Both the Corvette and the Z4 have standard driver and passenger frontal airbags, front side-impact airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and rearview cameras.
Chevrolet’s powertrain warranty covers the Corvette 1 year and 10,000 miles longer than BMW covers the Z4. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the Z4 ends after only 4 years or 50,000 miles.
There are almost 9 times as many Chevrolet dealers as there are BMW dealers, which makes it much easier should you ever need service under the Corvette’s warranty.
J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Chevrolet vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Chevrolet 6th in initial quality, above the industry average. With 5 more problems per 100 vehicles, BMW is ranked 11th.
J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Chevrolet vehicles are more reliable than BMW vehicles. J.D. Power ranks Chevrolet 6th in reliability, above the industry average. With 3 more problems per 100 vehicles, BMW is ranked 8th.
The Corvette has more powerful engines than the Z4:
Corvette 6.2 V8
Corvette Z51 6.2 V8
Corvette Z06 6.2 supercharged V8
Corvette ZR1 6.2 supercharged V8
Z4 sDrive30i 2.0 turbo 4 cyl.
Z4 M40i 3.0 turbo 6 cyl.
An engine control system that can shut down half of the engine’s cylinders helps improve the Corvette (except ZR1)’s fuel efficiency. The Z4 doesn’t offer a system that can shut down part of the engine.
To lower fuel costs and make buying fuel easier, the Chevrolet Corvette uses regular unleaded gasoline (premium recommended for maximum performance). The Z4 requires premium, which can cost 20 to 55 cents more per gallon.
The Corvette has 4.8 gallons more fuel capacity than the Z4 (18.5 vs. 13.7 gallons), for longer range between fill-ups.
The Corvette has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The Z4 doesn’t offer a cap-less fueling system.
The Corvette offers a manual transmission for better acceleration, control and fuel economy. The Z4 doesn’t offer a manual transmission.
The Corvette Z06/Grand Sport offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The Z4 doesn’t offer ceramic brake rotors.
For better traction, the Corvette has larger standard tires than the Z4 (F:245/35R19 & R:285/30R20 vs. F:225/45R18 & R:255/40R18). The Corvette Z06/Grand Sport/ZR1’s tires are larger than the largest tires available on the Z4 (F:285/30R19 & R:335/25R20 vs. F:255/35R19 & R:275/35R19).
The Corvette’s standard 245/35R19 front and 285/30R20 rear tires provide better handling because they have a lower 35 series front and 30 series rear profile (height to width ratio) that provides a stiffer sidewall than the Z4’s standard 45 series front and 40 series rear tires. The Corvette Z06/Grand Sport/ZR1’s 285/30R19 front and 335/25R20 rear tires have a lower 30 series front and 25 series rear profile than the Z4’s optional 35 series tires.
For better ride, handling and brake cooling the Corvette has standard 19-inch front and 20-inch rear wheels. Smaller 18-inch wheels are standard on the Z4. The Z4’s largest wheels are only 19-inches.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the Corvette can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Z4 doesn’t offer run-flat tires.
For a smoother ride and more stable handling, the Corvette’s wheelbase is 9.5 inches longer than on the Z4 (106.7 inches vs. 97.2 inches).
The Corvette has .8 inches more front legroom and .9 inches more front shoulder room than the Z4.
The Corvette’s front power windows open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Z4’s passenger windows don’t open or close automatically.
Optional air-conditioned seats in the Corvette keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The Z4 doesn’t offer air-conditioned seats.
The Chevrolet Corvette comes in coupe and convertible bodystyles; the BMW Z4 isn’t available as a coupe.
The Corvette was chosen as one of Car and Driver’s “Top Ten” for 15 of the last 22 years. The Z4 has never been a Car and Driver “Top Ten” pick.
The Corvette was selected by Automobile Magazine as their 2014 Car of the Year. The Z4 has never been chosen.
A group of representative automotive journalists from North America selected the Corvette as the 2014 North American Car of the Year. The Z4 has never been chosen.
© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.
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