Red Bull are running with a new 'double' diffuser in the Principality while championship leaders Brawn also have a series of modifications, including a new rear wing configuration, changes to the car's suspension and a reconfigured chassis to suit the tight, twisty track.
For sportier handling, there is an optional "Euro-tuned" suspension that makes the car more responsive.
The question is certainly when, not if, but this suspension may just be another car passing the driveway.
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No other vehicle was involved when the BMW patrol car suffered a shredded tyre and broken suspension strut on 26 October.
The incident broke the right-front suspension of Hamilton's car, putting him out of the race, and damaged the rear of Raikkonen's Ferrari sufficiently for him to be forced into retirement, too.
Sprung with double wishbones, coil springs and adaptive monotube dampers, the car offers a choice of three drive modes Tour, Sport and Track with escalating thresholds for the car's engine, transmission, suspension and stability logic.
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The 500C doesn't have a very tenacious grip on the road 15-inch tires will do that and the same suspension compliance that allows the car to negotiate ugly potholes makes the car pretty spongy in corners.
European governments have encouraged this through subsidies, controls on Japanese imports, suspension of normal competition rules for car retailing and resistance to mass redundancies.
My test car doesn't have the Triplex rear suspension.
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Instead of a central engine each wheel is powered by "wheel robots", independent motors and suspension systems that would allow the car to maneuver in tight streets and even park sideways by turning 90 degrees.
The Red Bull is the only car to incorporate a pull-rod rear suspension, which is incorporated into their gearbox design and means there is little room at the back of the car to add a split-level diffuser.
The car I drove, with the FE3 sports-suspension option, tended to get a little choppy in turns with uneven pavement, at moments requiring me to gather it in a bit.
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Some racy tires and aftermarket suspension tuning would transform the handling of this car.
For a grand touring car, the Vanquish can get downright flinty in the suspension (the 20-inch, no-profile Pirellis don't help).
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And the chassis and suspension have also been significantly upgraded, making the car exceedingly quiet--and able to corner smartly at well over 130 mph with unerring agility.
There are a few changes to last year's car with Ferrari retaining the front and rear pull-rod suspension, while the rear of this year's model is narrower and more tapered.
Similarly, by adjusting the parameters of the mathematical model, it is possible to change the design of the virtual car, trying out different gearboxes and gear ratios, or adjusting the suspension.
But Folz defines it to include not only the skeleton of the car but also the engine, the gear box, the transmission and the suspension.
The pitch of the electric whine goes up, the suspension sinks down, but compared with an internal-combustion sports car quaint thing that it is now this car slips silently as a dagger into triple-digit speed.
Even though the car is 3.5 inches shorter overall, and even though the front suspension has gone from double A-arm to McPherson strut, it looks as though the team of stylists barely changed pens.
Both these cars have suspension setups that allow an unusual amount of free play in the rear of the car.
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Take a car like the Mustang Boss 302: 444 hp, limited-slip rear differential, race-tuned suspension and 9.5-inch-wide, 19-inch Pirelli P Zero tires.
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Or maybe someone who is just an irresponsible driver not named Pryor, legally receives a car, but fails to show police proof of insurance while driving 90 mph, and has a license suspension.
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Combined with the Titanium's optional 18-inch summer rubber and leaner sport suspension, the torque vectoring turns a fairly good front-driver into a fervid and stubborn little gymkhana car.
Of course, defenders of the series insist its entire basis is as a modern fantasy - and suspension of disbelief is required during the sex scenes just as much as it is for the fights, car chases, gadgets and super-villains.
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