| Signature | Ultimate | |
Engine | ||
| Type | DOHC 32-valve Tau® V8, Dual CVVT (Continuous Variable Valve Timing), Gasoline Direct Injection (GDI), Tuned Intake System (TIS) | DOHC 32-valve Tau® V8, Dual CVVT (Continuous Variable Valve Timing), Gasoline Direct Injection (GDI), Tuned Intake System (TIS) |
| Materials | Aluminum block and head | Aluminum block and head |
| Displacement | 5.0 liters / 5,038 cc | 5.0 liters / 5,038 cc |
| Bore and Stroke | 96.0 mm x 87.0 mm | 96.0 mm x 87.0 mm |
| Horsepower | 429 @ 6,400 rpm – Premium | 429 @ 6,400 rpm – Premium |
| Torque | 376 lb-ft @ 5,000 rpm – Premium | 376 lb-ft @ 5,000 rpm – Premium |
| Valves per cylinder | 4 | 4 |
| Compression Ratio | 11.5:1 | 11.5:1 |
Transmission | ||
8-speed electronic automatic with SHIFTRONIC™ manual shift mode and lock-up torque converter | ||
| First | 3.795:1 | 3.795:1 |
| Second | 2.473:1 | 2.473:1 |
| Third | 1.613:1 | 1.613:1 |
| Fourth | 1.177:1 | 1.177:1 |
| Fifth | 1.000:1 | 1.000:1 |
| Sixth | 0.831:1 | 0.831:1 |
| Seventh | 0.652:1 | 0.652:1 |
| Eighth | 0.571:1 | 0.571:1 |
| Reverse | 2.467:1 | 2.467:1 |
| Final Drive | 3.538:1 | 3.538:1 |
| Transmission Fluid (quarts) | 11.2 | 11.2 |
Suspension | ||
Electronically-Controlled Air Suspension (EAS) with Continuous Damping Control (CDC), height adjustable and driver-selectable Sport mode | ||
| Front | Multi-link suspension with 29-mm stabilizer bar | Multi-link suspension with 29-mm stabilizer bar |
| Rear | Multi-link suspension with 18-mm stabilizer bar | Multi-link suspension with 18-mm stabilizer bar |
Steering | ||
| Type | Electro-Hydraulic Power Steering (EHPS), vehicle-speed sensing | Electro-Hydraulic Power Steering (EHPS), vehicle-speed sensing |
| Overall Ratio | 15.5:1 | 15.5:1 |
| Turns, lock to lock | 2.8 | 2.8 |
| Turning Circle | 39.6 ft. | 39.6 ft. |
Brakes/ Tires/ Wheels | ||
| Front | Power assisted 14.2-in. ventilated disc, pad wear warning device | Power assisted 14.2-in. ventilated disc, pad wear warning device |
| Rear | Power assisted 12.4-in. ventilated disc, pad wear warning device | Power assisted 12.4-in. ventilated disc, pad wear warning device |
| ABS | 4-wheel, 4-channel and 4-sensor with Electronic Brake-force Distribution (EBD) | 4-wheel, 4-channel and 4-sensor with Electronic Brake-force Distribution (EBD) |
| Tires | P245/45R19 (front) / P275/40R19 (rear) | P245/45R19 (front) / P275/40R19 (rear) |
| Wheels | Front: 19-in. 9-spoke chrome alloy (19 x 8.0J) / Rear: 19-in. 9-spoke chrome alloy (19 x 9.0J) | Front: 19-in. 9-spoke chrome alloy (19 x 8.0J) / Rear: 19-in. 9-spoke chrome alloy (19 x 9.0J) |
| Spare Tire | 18-in. (T155/80R18) | 18-in. (T155/80R18) |
Exterior Dimensions | ||
| Wheelbase | 119.9 in. | 119.9 in. |
| Overall length | 203.1 in. | 203.1 in. |
| Overall width (excluding mirrors) | 74.4 in. | 74.4 in. |
| Overall height | 58.7 in. | 58.7 in. |
| Track, front | 63.8 in. | 63.8 in. |
| Track, rear | 64.1 in. | 64.1 in. |
| Overhang, front | 34.6 in. | 34.6 in. |
| Overhang, rear | 48.6 in. | 48.6 in. |
| Coefficient of drag (Cd) | 0.27 | 0.27 |
Interior Dimensions | ||
Head room | ||
| Front (with sunroof) | 38.7 in | 38.7 in |
| Rear | 37.7 in. | 37.7 in. |
Leg room | ||
| Front | 45.1 in. | 45.1 in. |
| Rear | 38.9 in. | 38.9 in. |
Shoulder room | ||
| Front | 59.1 in. | 59.1 in. |
| Rear | 58.0 in. | 58.0 in. |
Hip room | ||
| Front | 55.5 in. | 55.5 in. |
| Rear | 55.1 in. | 55.1 in. |
| EPA passenger volume | 109.3 cu. ft. | 109.3 cu. ft. |
| EPA cargo volume | 16.7 cu. ft. | 16.7 cu. ft. |
| EPA total volume | 126.0 cu. ft. | 126.0 cu. ft. |
Capacities | ||
| Fuel | 20.3 gallons | 20.3 gallons |
| Oil | 7.2 quarts | 7.2 quarts |
| Coolant | 7.5 quarts | 7.5 quarts |
Curb Weight | ||
| Curb Weight | 4,486 – 4,605 lbs | 4,524 – 4,643 lbs |
Fuel Economy (Estimated) | ||
| City | 15 mpg | 15 mpg |
| Highway | 23 mpg | 23 mpg |
| Combined | 18 mpg | 18 mpg |
