TT

Z4

Zero to 30 MPH

1.5 sec

1.9 sec

Zero to 60 MPH

4.2 sec

5.1 sec

Zero to 100 MPH

10.7 sec

13.2 sec

5 to 60 MPH Rolling Start

5.6 sec

6.1 sec

Passing 30 to 50 MPH

2.7 sec

3.3 sec

Passing 50 to 70 MPH

3.1 sec

3.8 sec

Quarter Mile

12.8 sec

13.8 sec

Speed in 1/4 Mile

108 MPH

102 MPH

Transmission and Drivetrain

The TT offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The Z4 doesn’t offer an SMG or a conventional manual transmission.

All wheel drive, available in the TT, provides the best traction for acceleration in wet, dry, and icy conditions. In corners, all wheel drive allows both outside wheels to provide power, balancing the car. This allows for better handling. The BMW Z4 is not available with all wheel drive.

Brakes and Stopping

For better stopping power the TT RS Coupe’s front brake rotors are larger than those on the Z4:

TT RS Coupe

Z4 sDrive30i

Z4 M40i

Front Rotors

14.6 inches

13 inches

13.7 inches

The TT RS 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.

The TT stops shorter than the Z4:

TT

Z4

70 to 0 MPH

140 feet

146 feet

Car and Driver

Tires and Wheels

For better traction, the TT has larger standard tires than the Z4 (245/40R18 vs. 225/45R18).

The TT 45 TSFI’s standard tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the Z4’s standard 45 series front tires. The TTS/RS’ optional tires have a lower 30 series profile than the Z4’s optional 35 series tires.

For better ride, handling and brake cooling the TTS/RS offers optional 20-inch wheels. The Z4’s largest wheels are only 19-inches.

Suspension and Handling

For a smoother ride and more stable handling, the TT’s wheelbase is 1.4 inches longer than on the Z4 (98.6 inches vs. 97.2 inches).

For better maneuverability, the TT’s turning circle is 1.2 feet tighter than the Z4’s (34.8 feet vs. 36 feet).

Chassis

The TT is 5.7 inches shorter than the Z4, making the TT easier to handle, maneuver and park in tight spaces.

Passenger Space

The TT Coupe has standard seating for 4 passengers; the Z4 can only carry 2.

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Audi service is better than BMW. J.D. Power ranks Audi 8th in service department satisfaction (above the industry average). With a 10% lower rating, BMW is ranked 11th.

Ergonomics

Heated windshield washer nozzles are standard on the TT to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The Z4 doesn’t offer heated windshield washer nozzles.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi TT has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the Z4.

Model Availability

The Audi TT comes in coupe and convertible bodystyles; the BMW Z4 isn’t available as a coupe.

Recommendations

Consumer Reports? recommends the Audi TT, based on reliability, safety and performance. The BMW Z4 isn't recommended.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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