Way off the mark, Jack.
I don't have a detailed test for the F10 550i sedan, but check out the readings for the F11 550i GT. Further, the F11 550i GT are on inferior tires. One can reasonably conclude that the F10 550i sedan although has more luxe, crushes the E60 550i in performance (with sport package, less luxe and inferior performance).
The F10 550i readings
Tire brand Goodyear
Tire model Excellence
Tire type Asymmetrical summer run-flat
Tire size, front 245/40R20 99Y
Tire size, rear 275/35R20 102Y
Wheel size 20-by-8.5 inches front -- 20-by-10 inches rear
Wheel material Aluminum alloy
Brakes, front 14.7-inch ventilated disc with single-piston sliding caliper
Brakes, rear 14.6-inch ventilated disc with single-piston sliding caliper
Track Test Results
0-45 mph (sec.) 3.5 (3.5 traction control on)
0-60 mph (sec.) 5.3 (5.4 traction control on)
0-75 mph (sec.) 7.4 (7.4 traction control on)
1/4-mile (sec. @ mph) 13.4 @ 105.7 (13.4 @ 105.5 traction control on)
0-60 with 1 foot of rollout (sec.) 5.1 (5.1 traction control on)
Braking, 30-0 mph (ft.) 28
60-0 mph (ft.) 112
Slalom, 6 x 100 ft. (mph) 65.0 (62.2 stability control on)
Skid pad, 200-ft. diameter (lateral g) 0.85 (0.83 stability control on)
http://www.insideline.com/bmw/5-series/2010/2010-bmw-550i-gran-turismo-full-test-and-video.html
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Now see the readings for the 2009 E60 550i, with sport package and better tires on the sedan.
Tire brand Continental
Tire model Sport Contact 2
Tire type Summer Performance
Tire size, front 245/35R19 93Y
Tire size, rear 275/30R19 96Y
Track Test Results
0-45 mph (sec.) 3.7 (3.9 with traction control on)
0-60 mph (sec.) 5.5 (5.6 with traction control on)
0-75 mph (sec.) 8.0 (8.1 with traction control on)
1/4-mile (sec. @ mph) 13.7 @ 102.7 (13.8 @ 102.6 with traction control on)
0-60 with 1 foot of rollout (sec.) 5.2 (5.3 with traction control on)
Braking, 30-0 mph (ft.) 28
60-0 mph (ft.) 111
Slalom, 6 x 100 ft. (mph) 64.9 (63.0 with stability control on)
Skid pad, 200-ft. diameter (lateral g) 0.87 (0.86 with stability control on)
http://www.insideline.com/bmw/5-ser...bmw-550i-sport-vs-2010-jaguar-xf-premium.html