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To provide maximum traction and stability on all roads, Full-Time Four-Wheel Drive is standard on the Spectre. But it costs extra on the i7.
Both the Spectre and the i7 have standard driver and passenger frontal airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and driver alert monitors.
The Spectre comes with a full 4-year/unlimited-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The i7’s 4-year/50,000-mile basic warranty expires sooner.
Rolls-Royce pays for scheduled maintenance on the Spectre for 1 year and unlimited miles longer than BMW pays for maintenance for the i7 (4/unlimited vs. 3/36,000).
The Spectre’s electric motors produces 128 more horsepower (577 vs. 449) and 115 lbs.-ft. more torque (664 vs. 549) than the i7 eDrive50’s standard electric motor. The Spectre’s electric motors produces 41 more horsepower (577 vs. 536) and 115 lbs.-ft. more torque (664 vs. 549) than the i7 xDrive60’s standard electric motors.
On the EPA test cycle the Spectre gets better mileage than the i7:
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MPGe |
| Spectre |
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AWD |
Electric Motors |
77 city/86 hwy |
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Black Badge Electric Motors |
74 city/84 hwy |
| i7 |
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AWD |
M70 20" Wheels Electric Motors |
74 city/80 hwy |
The Spectre can travel longer on a full charge than the i7 on a full charge:
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Miles |
| Spectre |
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AWD |
Electric Motors |
291 miles |
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Black Badge Electric Motors |
280 miles |
| i7 |
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AWD |
M70 20" Wheels Electric Motors |
274 miles |
For better traction, the Spectre has larger standard tires than the i7 (F:255/45R22 & R:285/40R22 vs. 245/50R19).
The Spectre’s standard 255/45R22 front and 285/40R22 rear tires provide better handling because they have a lower 45 series front and 40 series rear profile (height to width ratio) that provides a stiffer sidewall than the i7’s 50 series tires.
For better ride, handling and brake cooling the Spectre has standard 22-inch wheels. Smaller 19-inch wheels are standard on the i7. The Spectre’s optional 23-inch wheels are larger than the 21-inch wheels optional on the i7.
Heated windshield washer nozzles are standard on the Spectre to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The i7 doesn’t offer heated windshield washer nozzles.