Porsche Boxster Performance. Traction control. Monoblock Brakes. ABS. Tiptronic. 150kW (204 HP) at 6000 rpm and 245Nm. You always have the performance you need – without delay or hesitation. Even at low revs the engine response is eager and immediate.
The outstanding power-weight ratio of the Porsche Boxster means there is always power to spare, even when the car is fully laden.
After all, the 6-cylinder engine is designed to power a sports car. And not just any sports car, but a Porsche.
Transmission & Chassis. Gearbox, steering, chassis and brakes must live up to the engine’s performance. That applies to the Boxster just like to other cars.
With the Boxster you can choose between a close-ratio 5-speed gearbox and the new Tiptronic S system, a five-speed automatic transmission with a choice of fully automatic or manual gear selection.
The chassis has a decisive impact on safety, agility, handling quality and comfort. That’s why the Boxster chassis is designed to meet the toughest requirements.
Based on experience gained with the 911, the Boxster chassis is state of the art. Completely new in design, it offers sports-car performance to the demanding driver as well as comfort in normal everyday driving. The mono-bloc braking system is an idea borrowed from motor racing. Originally designed for the Porsche 956 Group C car and today state of the art in Formula 1 racing, this is the first time it has been fitted to a production sports car.
Five-speed gearbox. The ratios have been carefully chosen to ensure that there is no drop in revs when changing up under acceleration. You always find yourself at a point in the rev range where the engine continues to produce strong, smooth acceleration. Yet the ratios are never too close to interfere with driving comfort.
The tried and tested double-mass flywheel prevents any irritating clashing of gears. Cable operation means that vibration cannot be transmitted from the engine/gearbox unit to the gearchange mechanism. A hydraulic clutch is fitted.
New Tiptronic S system. The Boxster can be supplied on request with Tiptronic S. Briefly, Tiptronic S is an automatic transmission which also allows manual gear changing. You can choose between allowing the transmission to change gear automatically according to one of the 5 gear shift programmes and deciding when to change gear yourself.
Tiptronic S 5-speed automatic. In automatic mode (phase D) the five speeds of the Tiptronic S system are selected according to one of five different gear shift programmes, ranging from a highly economical programme for leisurely driving to the sport programme for maximum acceleration and performance.
The specific programme is selected by an electronic control unit depending on the way you drive. Based on the movements of the accelerator over a period of time, the control unit works out which programme is best matched to your current driving style.
The fact that Tiptronic S offers 5 speeds within each gear shift programme is particularly valuable when maximum acceleration and performance are required. Gear changes take place without traction being interrupted, allowing Tiptronic S to offer very dynamic driving. In addition, other functions take external factors into account. Like the warm-up programme, for example, which ensures higher rpm and enables the catalytic converters to reach their operating temperatures rapidly.
When rapid accelerator pedal movements are detected, Tiptronic S immediately switches to the dynamic performance mode. When the driver suddenly takes his or her foot off the accelerator when approaching a bend, for example, it prevents upwards gear changes.
Under heavy braking Tiptronic S changes down into the next lower gear. This means that engine braking helps to slow the car down. The control unit also selects the appropriate gear for braking on approach to bends when driving for maximum performance.
When the car experiences high lateral acceleration in bends the transmission is locked in gear, even if you take your foot off the accelerator, to prevent accidental upward changes.
Going up or down hill the automatic transmission selects a lower gear. When the wheels lose their grip, for example on ice, it selects a higher gear.
Manual gear changing with the Tiptronic S.
You can also choose to change gear manually, driving just as you would in a Boxster with a manual gearbox but without using the clutch.
Place the gear lever in the “M” position. Now you can operate the rocker switches on the steering wheel with your thumbs to change gear. Just press up to change up, and down to change down. There is never any interruption in drive to the wheels.
This is the same principle as in Formula 1 racing. The objective is faster changes, and improved safety through keeping both hands on the steering wheel. Whether changing manually or automatically, Tiptronic S adapts itself perfectly to your driving style and your needs.
Chassis. The design of the front and rear axles, both based on the MacPherson principle, is completely new. Strict use of lightweight construction has kept the overall weight of the Boxster and particularly that of the unsprung masses low. The mid-engine design combined with a sophisticated suspension minimises rolling and pitching movements when cornering, braking and accelerating.
The vehicle does not “seesaw”. The steering is spontaneous and direct with optimal feedback. Lane changes can be made safely even at high speeds.
The suspension and steering ensure a high degree of driving safety, irrespective of load, as well as easily controllable reactions to load changes on bends. Cornering stability is no problem even under high lateral acceleration.
Straight-line stability is first-rate, as you would expect from a Porsche.
Sports package. The Boxster is available on request with a sports package which includes tuned suspension and steering along with 17-inch wheels and traction control. The body then sits 10mm lower at front and rear, on shorter and harder springs. The anti-roll bars are stronger and the shock absorbers tuned for firmer control. This package offers improved handling without too great a loss of comfort. 17-inch wheels and traction control are also available as separate options.
Steering. The Boxster’s steering is also a new development. The sensitive response provided by the rack and pinion system will be welcomed by drivers seeking to use the Boxster’s performance to the full. Installation of an additional check valve also allows enhanced comfort. Shocks imparted to the wheels by poor road surfaces, for example, are considerably dampened. Sensitive response, good feedback and low lock-to-lock travel all make for high active safety. The small turning circle (10.9mm) and low effort required for parking mean that the steering is also well-suited to low-speed, everyday driving needs.
The steering wheel features reach adjustment.
Engine and gearbox mounting. The engine and gearbox are mounted on special “hydro” mounting blocks which prevent both low and high frequency vibration reaching the body of the car. The engine has one central mounting point, and the gearbox is held by two large “hydro” mountings. This three-point mounting system prevents the vibration of the body which is typical of open cars, without any penalty in terms of extra weight. Both vibration and noise are significantly reduced.
Braking system. The Boxster is the first production car in the world to be fitted with monobloc brake callipers. Compared to the conventional two-part design, they offer greater rigidity, take up less space, and also weigh less. They produce a particularly fast response even to light pressure on the brake pedal.
The monobloc brake was originally developed for the Porsche 956 Group C car, and today it is the norm in Formula 1 racing. The four pistons in each calliper are of different sizes to prevent uneven wear of the brake pads. A special ventilation system has been developed to avoid fading. This considerably increases the ability of the brakes to offer outstanding performance time after time, even under the heaviest use.
Together with the ABS5.3 system, featuring even more sophisticated control parameters, the brakes on the Boxster achieve the highest performance standard possible on a series production car.
Traction control (TC). Traction control to increase driving safety is available as an option. Traction control is a combination of the functions of an automatic brake differential (ABD) and an anti-slip mechanism (ASR). Together with ABS5.3 technology fitted as standard, this provides the Boxster with maximum traction during acceleration and ensures straight-line stability. If a wheel is in danger of spinning under acceleration, the brake on that wheel will be applied to prevent it. If both wheels spin despite braking, engine control comes into play. In a matter of split seconds, the Motronic 5.2 engine management system cuts down the amount of fuel being injected into the engine and retards the ignition timing until traction is restored.
Traction control is effective over the whole speed range, and is normally enabled when you start the engine. However, it can be switched off manually. The automatic brake differential (ABD) always remains in operation: on acceleration with the TC function disabled the vehicle behaves like a vehicle with a conventional limited-slip differential with variable locking up to 100%. ABD is effective up to a maximum speed of 100km/h.