| Engine | XK Coupe | XK Convertible | XKR Coupe | XKR Convertible |
| Type | DOHC | DOHC | DOHC | DOHC |
| Cam phasing | Variable | Variable | Variable | Variable |
| Construction | Aluminum alloy cylinder head/block | Aluminum alloy cylinder head/block | Aluminum alloy cylinder head/block | Aluminum alloy cylinder head/block |
| Cylinders | 90-degree V8 | 90-degree V8 | 90-degree V8 | 90-degree V8 |
| Valves per cylinder | 4 | 4 | 4 | 4 |
| Bore | 86 mm (3.39 in.) | 86 mm (3.39 in.) | 86 mm (3.39 in.) | 86 mm (3.39 in.) |
| Stroke | 90.3 mm (3.56 in.) | 90.3 mm (3.56 in.) | 90.3 mm (3.56 in.) | 90.3 mm (3.56 in.) |
| Displacement | 4.2 litre | 4.2 litre | 4.2 litre | 4.2 litre |
| Compression ratio | 10.75:1 | 10.75:1 | 9.1:1 | 9.1:1 |
| Induction | Naturally aspirated | Naturally aspirated | Supercharged | Supercharged |
| Horsepower (SAE) | 300 bhp @ 6,000 rpm | 300 bhp @ 6,000 rpm | 420 bhp @ 6,000 rpm | 420 bhp @ 6,000 rpm |
| Maximum torque | 310 lb.-ft. @ 4,100 rpm | 310 lb.-ft. @ 4,100 rpm | 413 lb.-ft. @ 4,000 rpm | 413 lb.-ft. @ 4,000 rpm |
| Performance | XK Coupe | XK Convertible | XKR Coupe | XKR Convertible |
| 0-100 km/h (0-60 mph) | 6.1 seconds (5.9 seconds) | 6.2 seconds (6.0 seconds) | 5.2 seconds (4.9 seconds) | 5.3 seconds (5.0 seconds) |
| Maximum speed (electronically limited) | 250 km/h | 250 km/h | 250 km/h | 250 km/h |
| EPA estimated fuel economy (L/100 km) | 13.1 city/8.0 highway | 13.1 city/8.0 highway | 13.7 city/8.8 highway | 13.7 city/8.8 highway |
| Braking | XK Coupe | XK Convertible | XKR Coupe | XKR Convertible |
| Front | 12.83 x 1.18 in. ventilated discs, fixed cast iron calipers | 12.83 x 1.18 in. ventilated discs, fixed cast iron calipers | 13.98 in. x 1.26 in. ventilated disks, fixed cast iron calipers | 13.98 in. x 1.26 in. ventilated disks, fixed cast iron calipers |
| Rear | 12.8 x 0.79 in. ventilated discs, fixed cast iron calipers | 12.8 x 0.79 in. ventilated discs, fixed cast iron calipers | 12.8 x 0.79 in. ventilated discs, fixed cast iron calipers | 12.8 x 0.79 in. ventilated discs, fixed cast iron calipers |
| Wheels & Tires | XK Coupe | XK Convertible | XKR Coupe | XKR Convertible |
| Wheels | 19 x 8.5 in. (front) 19 x 9.5 in. (rear) cast alloy, Carelia | 19 x 8.5 in. (front) 19 x 9.5 in. (rear) cast alloy, Carelia | 19 x 8.5 in. cast alloy, Jupiter | 19 x 8.5 in. cast alloy, Jupiter |
| Tires | 245/40 XR19 (front) 275/35 XR19 (rear) | 245/40 XR19 (front) 275/35 XR19 (rear) | 245/40 XR19 (front) 275/35 XR19 (rear) | 245/40 XR19 (front) 275/35 XR19 (rear) |
| Steering | XK Coupe | XK Convertible | XKR Coupe | XKR Convertible |
| Turning circle (curb to curb) | 33 ft. 4 in. | 33 ft. 4 in. | 33 ft. 4 in. | 33 ft. 4 in. |
| Dimensions | XK Coupe | XK Convertible | XKR Coupe | XKR Convertible |
| Length | 4,790 mm (188.6 in.) | 4,790 mm (188.6 in.) | 4,790 mm (188.6 in.) | 4,790 mm (188.6 in.) |
| Height | 1,320 mm (52.0 in.) | 1,328 mm (52.3 in.) | 1,320 mm (52.0 in.) | 1,328 mm (52.3 in.) |
| Width (including mirrors) | 2,070 mm (81.5 in.) | 2,070 mm (81.5 in.) | 2,070 mm(81.5 in.) | 2,070 mm (81.5 in.) |
| Wheelbase | 2,750 mm (108.3 in.) | 2,750 mm (108.3 in.) | 2,750 (108.3 in.) | 2,750 mm (108.3 in.) |
| Curb weight | 1,665 kg (3,671 lb.) | 1,707 kg (3,759 lb.) | 1,665 kg (3,814 lb.) | 1,705 kg (3,924 lb.) |
| Headroom (front) | 970 mm (38.2 in.) | 972 mm (38.3 in.) | 970 mm (38.2 in.) | 972 mm (38.3 in.) |
| Headroom (rear) | 846 mm (33.3 in.) | 843 mm (33.2 in.) | 846 mm (33.3 in.) | 843 mm (33.2 in.) |
| Shoulder room (front) | 1,437 mm (56.6 in.) | 1,435 mm (56.5 in.) | 1,437 mm (56.6 in.) | 1,435 mm (56.5 in.) |
| Shoulder room (rear) | 1,308 mm (51.5 in.) | 1,074 mm (42.3 in.) | 1,308 mm (51.5 in.) | 1,074 mm (42.3 in.) |
| Legroom (front) | 1,145 mm (45.1 in.) | 1,145 mm (45.1 in.) | 1,145 mm (45.1 in.) | 1,145 mm (45.1 in.) |
| Legroom (rear) | 602 mm (23.7 in.) | 602 mm (23.1 in.) | 602 mm (23.7 in.) | 602 mm (23.1 in.) |
| Capacities | XK Coupe | XK Convertible | XKR Coupe | XKR Convertible |
| Trunk with roof up (with space saver) | 300 L (10.6 cu. ft.) | 283 L (10.0 cu. ft.) | 300 L (10.6 cu. ft.) | 283 L (10.0 cu. ft.) |
| Trunk with roof down (with space saver) | n/a | 201 L (7.1 cu. ft.) | n/a | 201 L (7.1 cu. ft.) |
| Trunk with roof up (with runflat) | 331 L (11.7 cu. ft.) | 314 L (11.1 cu. ft.) | 331 L (11.7 cu. ft.) | 314 L (11.1 cu. ft.) |
| Trunk with roof down (with runflat) | n/a | 229 L (8.1 cu. ft.) | n/a | 229 L (8.1 cu. ft.) |
| Fuel | 70.6 L | 70.6 L | 70.6 L | 70.6 L |