| Model year | 2011 |
| Make | Jaguar |
| Model | XJ |
| Style | XJ L Supercharged 4dr Sedan (5.0L 8cyl S/C 6A) |
| Base MSRP | $89,650 |
| Options on test vehicle | Burl Walnut Veneer ($0); Leather Steering Wheel ($0); Canvas-Colored Headliner ($0). |
| As-tested MSRP | $90,500 |
| Drive type | Rear-wheel Drive |
| Engine type | Supercharged, direct-injected V8 |
| Displacement (cc/cu-in) | 5,000cc (305 cu-in) |
| Block/head material | Aluminum/aluminum |
| Valvetrain | DOHC, four valves per cylinder, variable intake + exhaust-valve timing |
| Compression ratio (x:1) | 9.5 |
| Horsepower (hp @ rpm) | 470 @ 6,000 |
| Torque (lb-ft @ rpm) | 424 @ 2,500 |
| Fuel type | Premium unleaded (required) |
| Transmission type | Six-speed automatic |
| Transmission and axle ratios (x:1) | I=4.017; II=2.43; III=1.52; IV=1.14: V=0.87; VI=0.69 Final drive=3.31 |
| Suspension, front | Independent double wishbones, coil springs, self-adjusting two-mode variable dampers, stabilizer bar |
| Suspension, rear | Independent multilink, coil springs, self-adjusting two-mode variable dampers, stabilizer bar |
| Steering type | Hydraulic-assist, speed-proportional rack-and-pinion power steering |
| Tire brand | Dunlop |
| Tire model | SP Sport Maxx GT J |
| Tire type | Performance front and rear |
| Tire size, front | 245/40ZR20 |
| Tire size, rear | 274/35ZR20 |
| Wheel size | 20-by-9 inches front -- 20-by-10 inches rear |
| Wheel material | Cast aluminum |
| Brakes, front | 15.0-inch ventilated cast-iron discs with 2-piston fixed calipers |
| Brakes, rear | 14.8-inch solid cast-iron discs with single-piston sliding calipers |
| Acceleration, 0-30 mph (sec.) | 1.9 |
| 0-45 mph (sec.) | 3.1 |
| 0-60 mph (sec.) | 4.5 |
| 0-75 mph (sec.) | 6.3 |
| 1/4-mile (sec. @ mph) | 12.6 @ 112.4 |
| 0-60 with 1 foot of rollout (sec.) | 4.2 |
| Braking, 30-0 mph (ft.) | 27 |
| 60-0 mph (ft.) | 106 |
| Slalom, 6 x 100 ft. (mph) | 62.3 |
| Skid pad, 200-ft. diameter (lateral g) | 0.84 |
| Sound level @ idle (dB) | 42.4 |
| @ Full throttle (dB) | 74.1 |
| @ 70 mph cruise (dB) | 66.9 |
| Acceleration comments | Fairly unobtrusive traction control, only a slight stumble. Disabling traction control for a run makes only a slight difference and requires diligence and prudence. There is so much torque that the rear tires light up at only 2,000 rpm! Also noted that if rear tires spin at all, transmission shifts up to 2nd gear. Tried one run in Manual mode, but tachometer is too slow to properly anticipate redline. Upshifts in Sport are fast and smooth. An impressively fast limousine. |
| Braking comments | Tremendously powerful brakes with medium-firm pedal effort and appropriate initial bite. Excellent fade resistance and chassis stability. |
| Handling comments | Skid pad: For some reason the XJ circled the skid pad slightly quicker counterclockwise with driver outboard. Light-effort steering but remains informative with feedback from tires. When stability control is engaged, the thottle will cut before the brakes are engaged, so soft intervention. Slalom: Remarkably crisp turn into the gates, with buttery-smooth steering action. The car feels smaller and lighter than it is, though the long wheelbase means you inadvertently run down the cones! Well-tuned stability control only dabs the brakes before returning control to the driver. |
| Elevation (ft.) | 1,121 |
| Temperature (°F) | 96 |
| Relative humidity (%) | 23.8 |
| Wind (mph, direction) | 10.8 headwind |
| EPA fuel economy (mpg) | 15 city/21 highway/17 combined |
| Fuel tank capacity (U.S. gal.) | 21.7 |
| Curb weight, mfr. claim (lbs.) | 4,323 |
| Curb weight, as tested (lbs.) | 4,341 |
| Weight distribution, as tested, f/r (%) | 51.5/48.5 |
| Length (in.) | 206.6 |
| Width (in.) | 74.6 |
| Height (in.) | 57.0 |
| Wheelbase (in.) | 124.3 |
| Track, front (in.) | 64.0 |
| Track, rear (in.) | 63.1 |
| Turning circle (ft.) | 41.7 |
| Legroom, front (in.) | 41.5 |
| Legroom, rear (in.) | 44.1 |
| Seating capacity | 5 |
| Cargo volume (cu-ft) | 15.2 |
| Bumper-to-bumper | 5 years/50,000 miles |
| Powertrain | 5 years/50,000 miles |
| Corrosion | 6 years/Unlimited miles |
| Roadside assistance | 5 years/50,000 miles |
| Free scheduled maintenance | 5 years/50,000 miles |
| Front airbags | Standard |
| Side airbags | Dual front |
| Head airbags | Front and rear |
| Antilock brakes | Four-wheel ABS |
| Electronic brake enhancements | Electronic brakeforce distribution |
| Traction control | Traction control |
| Stability control | Stability control |
| Tire-pressure monitoring system | Tire-pressure monitoring |
| Emergency assistance system | Blind spot warning |
| NHTSA crash test, driver | Not tested |
| NHTSA crash test, passenger | Not tested |
| NHTSA crash test, side front | Not tested |
| NHTSA crash test, side rear | Not tested |
| NHTSA rollover resistance | Not tested |
| IIHS offset | Not tested |
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