Son's Automotive Group Compares 2017 BMW 7 SERIES VS 2017 Lexus GS Near Norcross, GA

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2017 Lexus GS

Safety Comparison

The 7 Series’ pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The GS Series doesn’t offer pre-crash pretensioners.

Over 200 people are killed each year when backed over by motor vehicles. The 7 Series offers an optional backup collision prevention system which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The GS Series doesn’t offer backup collision prevention brakes.

The 7 Series offers an optional Surround View to allow the driver to see objects all around the vehicle on a screen. The GS Series only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

The 7 Series’ 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 GS Series doesn’t offer a driver alert monitor.

Both the 7 Series and the GS Series have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, crash mitigating brakes, night vision systems, lane departure warning systems, blind spot warning systems and rear cross-path warning.

Warranty Comparison

The 7 Series’ corrosion warranty is 6 years longer than the GS Series’ (12 vs. 6 years).

BMW pays for scheduled maintenance on the 7 Series for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Lexus only pays for the first scheduled maintenance visit on the GS Series.

There are over 43 percent more BMW dealers than there are Lexus dealers, which makes it easier should you ever need service under the 7 Series’ warranty.

Reliability Comparison

A hardened steel chain, with no maintenance needs, drives the camshafts in the 7 Series’ engine. A rubber belt that needs periodic replacement drives the GS 200t’s camshafts. If the GS Series’ cam drive belt breaks the engine could be severely damaged when the pistons hit the opened valves.

The battery on the 7 Series is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the 7 Series’ battery 20 to 30 degrees cooler, its life is increased by years. The GS Series’ battery is in the hot engine compartment.

J.D. Power and Associates’ 2016 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Lexus vehicles. J.D. Power ranks BMW fifth in initial quality, above the industry average. With 2 more problems per 100 vehicles, Lexus is ranked 7th.

Engine Comparison

The 7 Series has more powerful engines than the GS Series:




740i 3.0 turbo 6 cyl.

320 HP

332 lbs.-ft.

740e 2.0 turbo 4 cyl. hybrid

322 HP

369 lbs.-ft.

750i 4.4 turbo V8

445 HP

479 lbs.-ft.

Alpina B7 xDrive 4.4 turbo V8

600 HP

590 lbs.-ft.

M760i 6.6 turbo V12

601 HP

590 lbs.-ft.

GS 200t 2.0 turbo 4 cyl.

241 HP

258 lbs.-ft.

GS 350 3.5 DOHC V6

311 HP

280 lbs.-ft.

GS 450h 3.5 DOHC V6 hybrid

338 HP


As tested in Motor Trend the 750i is faster than the GS 450h:


7 Series

GS Series

Zero to 60 MPH

4.3 sec

6 sec

Quarter Mile

12.7 sec

14.4 sec

Speed in 1/4 Mile

111.9 MPH

101.8 MPH

Fuel Economy and Range Comparison

On the EPA test cycle the 740e running on electricity gets better fuel mileage than the GS 450h (62 city/68 hwy MPGe vs. 29 city/34 hwy).

On the EPA test cycle the 7 Series gets better fuel mileage than the GS Series:



7 Series

GS Series




21 city/29 hwy

20 city/28 hwy





19 city/27 hwy

350 F Sport/Auto



19 city/28 hwy

19 city/26 hwy


The 740e can drive on battery power alone for up to 14 miles. The GS Series must run its internal combustion engine to move.

Regardless of its engine, regenerative brakes improve the 7 Series’ fuel efficiency by converting inertia back into energy instead of wasting it. Lexus only offers a regenerative brake system on the GS Series Hybrid.

Regardless of its engine, the 7 Series’ 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.) Lexus only offers an automatic engine start/stop system on the GS Series Hybrid.

The 7 Series’ standard fuel tank has 3.2 gallons more fuel capacity than the GS Series (20.6 vs. 17.4 gallons).

Brakes and Stopping Comparison

For better stopping power the 7 Series’ brake rotors are larger than those on the GS Series:




GS Series

GS Series F Sport

Front Rotors

13.7 inches

15.5 inches

13.1 inches

14 inches

Rear Rotors

13.6 inches

14.5 inches

12.2 inches

12.2 inches

The 7 Series stops much shorter than the GS Series:


7 Series

GS Series


70 to 0 MPH

151 feet

174 feet

Car and Driver

60 to 0 MPH

113 feet

119 feet

Motor Trend

Tires and Wheels Comparison

For better traction, the 7 Series has larger standard tires than the GS Series (245/50R18 vs. 235/45R18). The Alpina B7 xDrive’s optional tires are larger than the largest tires available on the GS Series (F:255/35R21 & R:295/30R21 vs. F:235/40R19 & R:265/35R19).

The Alpina B7 xDrive’s optional 255/35R21 front and 295/30R21 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 GS Series’ optional 40 series front and 35 series rear tires.

For better ride, handling and brake cooling the 7 Series has standard 18-inch wheels. Smaller 17-inch wheels are standard on the GS 200t. The Alpina B7 xDrive’s optional 21-inch wheels are larger than the 19-inch wheels on the GS Series AWD.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the 7 Series can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The GS Series doesn’t offer run-flat tires.

Suspension and Handling Comparison

The 7 Series offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The GS Series doesn’t offer an active sway bar system.

The front and rear suspension of the 7 Series uses air springs for a smoother, controlled ride than the GS Series, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The 7 Series offers an available active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Lexus doesn’t offer an active suspension on the GS Series.

The 7 Series has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The 7 Series’ height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The GS Series doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the 7 Series’ wheelbase is 14.2 inches longer than on the GS Series (126.4 inches vs. 112.2 inches).

For better handling and stability, the track (width between the wheels) on the 7 Series is 1.4 inches wider in the front and 2.4 inches wider in the rear than on the GS Series.

The Alpina B7 xDrive handles at .97 G’s, while the GS 350 pulls only .88 G’s of cornering force in a Car and Driver skidpad test.

The 750i xDrive executes Motor Trend’s “Figure Eight” maneuver 1.5 seconds quicker than the GS 450h (25.4 seconds @ .75 average G’s vs. 26.9 seconds @ .68 average G’s).

Chassis Comparison

The front grille of the 7 Series uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The GS Series doesn’t offer active grille shutters.

As tested by Car and Driver, the interior of the 750i xDrive is quieter than the GS 350:


7 Series

GS Series

At idle

38 dB

40 dB


72 dB

79 dB

Passenger Space Comparison

Because it has more passenger and cargo room, the 7 Series is rated a Large car by the EPA, while the GS Series is rated a Mid-size.

The 7 Series has 15 cubic feet more passenger volume than the GS Series (114 vs. 99).

The 7 Series has 1.9 inches more front headroom, 1.9 inches more front shoulder room, 1.1 inches more rear headroom, 7.6 inches more rear legroom and 2 inches more rear shoulder room than the GS Series.

For enhanced passenger comfort on long trips the 7 Series’ available rear seats recline. The GS Series’ rear seats don’t recline.

Cargo Capacity Comparison

To allow full utilization of available cargo room, the 7 Series’ trunk lid uses concealed beam hinges that don’t intrude into the trunk. Its intrusive beam hinge reduces the GS Series’ useful trunk space.

To make loading groceries and cargo easier when your hands are full, the 7 Series’ trunk can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The GS Series doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Ergonomics Comparison

If the windows are left down on the 7 Series the driver can raise them all using the key in the outside lock cylinder. On a hot day the driver can lower the windows from outside the vehicle using the key in the outside lock cylinder or the keyless remote. The driver of the GS Series can only operate the windows from inside the vehicle, with the ignition on.

The 7 Series’ rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The GS Series’ standard manually variable intermittent wipers have to be constantly adjusted.

Optional air conditioned front and rear seats keep the 7 Series’ passengers comfortable and take the sting out of hot leather in Summer. The GS Series doesn’t offer air-conditioned seats in the rear.

The 7 Series’ optional Parking Assistant can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The GS Series doesn’t offer an automated parking system.

Economic Advantages Comparison

According to The Car Book by Jack Gillis, the 7 Series is less expensive to operate than the GS Series because it costs $72 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the 7 Series than the GS Series, including $94 less for an alternator, $20 less for front brake pads, $69 less for a starter, $8 less for fuel injection and $1412 less for a timing belt/chain.

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