Certified Benz & Beemer Compares 2013 Porsche BOXSTER VS 2013 BMW Z4 Near Phoenix, AZ

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2013 Porsche BOXSTER

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VS

2013 BMW Z4

Safety Comparison

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Both the Boxster and the Z4 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control and electronic stability systems to prevent skidding.

Reliability Comparison

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J.D. Power and Associates’ 2012 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Porsche second in initial quality, above the industry average. With 22 more problems per 100 vehicles, BMW is ranked 10th.

J.D. Power and Associates’ 2012 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Porsche vehicles are more reliable than BMW vehicles. J.D. Power ranks Porsche second in reliability, above the industry average. With 56 more problems per 100 vehicles, BMW is ranked 20th.

Engine Comparison

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As tested in Car and Driver the Boxster S is faster than the Z4 sDrive35i (manual transmissions tested):

Boxster

Z4

Zero to 60 MPH

4.4 sec

4.8 sec

Zero to 100 MPH

10.5 sec

11.7 sec

Quarter Mile

12.9 sec

13.5 sec

Speed in 1/4 Mile

111 MPH

106 MPH

Top Speed

176 MPH

149 MPH

As tested in Road & Track the Boxster S is faster than the Z4 sDrive35i (automatics tested):

Boxster

Z4

Zero to 30 MPH

1.6 sec

1.9 sec

Zero to 60 MPH

4.5 sec

4.8 sec

Zero to 80 MPH

7.3 sec

7.8 sec

Zero to 100 MPH

11.3 sec

11.7 sec

Quarter Mile

13 sec

13.3 sec

Speed in 1/4 Mile

107.4 MPH

106.7 MPH

The flat cylinder configuration of the boxer engine in the Boxster lowers its center of gravity, enhancing handling stability. The Z4 doesn’t offer a boxer engine configuration.

Fuel Economy and Range Comparison

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Regardless of its engine, the Boxster’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) BMW only offers an automatic engine start/stop system on the Z4 sDrive28i Manual.

The Boxster has 2.4 gallons more fuel capacity than the Z4 (16.9 vs. 14.5 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

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The Boxster 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 Boxster stops much shorter than the Z4:

Boxster

Z4

80 to 0 MPH

201 feet

208 feet

Road & Track

70 to 0 MPH

147 feet

161 feet

Car and Driver

60 to 0 MPH

101 feet

107 feet

Motor Trend

Tires and Wheels Comparison

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For better traction, the Boxster has larger tires than the Z4 (F:235/45R18 & R:265/45R18 vs. 225/45R17). The Boxster’s tires are larger than the largest tires available on the Z4 (F:235/45R18 & R:265/45R18 vs. F:225/40R18 & R:255/35R18).

For better ride, handling and brake cooling the Boxster has standard 18-inch wheels. Smaller 17-inch wheels are standard on the Z4 sDrive28i. The Boxster’s optional 20-inch wheels are larger than the 19-inch wheels optional on the Z4 sDriver35i/sDrive35is.

Suspension and Handling Comparison

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The Boxster S handles at .99 G’s, while the Z4 sDrive35i pulls only .83 G’s of cornering force in a Car and Driver skidpad test.

The Boxster S goes through Road & Track’s slalom 3.2 MPH faster than the Z4 sDrive35i (69.4 vs. 66.2 MPH).

The Boxster S executes Motor Trend’s “Figure Eight” maneuver quicker than the Z4 sDrive35i (24.6 seconds @ .81 average G’s vs. 25.2 seconds @ .74 average G’s).

Chassis Comparison

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The Porsche Boxster may be more efficient, handle and accelerate better because it weighs about 400 to 550 pounds less than the BMW Z4.

The design of the Porsche Boxster amounts to more than styling. The Boxster offers aerodynamic coefficients of drag from .3 to .31 Cd (depending on bodystyle and options). That is significantly lower than the Z4 (.34 to .35) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the Boxster get better fuel mileage.

As tested by Road & Track while cruising at 50 MPH, the interior of the Boxster S is quieter than the Z4 sDrive35i (68 vs. 72 dB).

Passenger Space Comparison

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The Boxster has .2 inches more front headroom and .8 inches more front legroom than the Z4.

Cargo Capacity Comparison

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The Boxster has a much larger trunk than the Z4 with its top down (9.9 vs. 6.4 cubic feet).

Ergonomics Comparison

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The Boxster’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The Z4 has neither an oil pressure gauge nor a temperature gauge.

Heated windshield washer nozzles are standard on the Boxster 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.

The Boxster’s optional air conditioned front seats cool the driver and front passenger and help take the sting out of hot leather in Summer. The Z4 doesn’t offer air conditioned front seats.

Economic Advantages Comparison

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The Boxster will cost the buyer less in the long run because of its superior resale value. Kiplinger’s estimates that the Boxster will retain a greater percentage of its original price after two and four years than the Z4.

Boxster

Z4

Four Year

42% to 43%

36% to 38%

Two Year

57% to 59%

54% to 56%

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