Tires have a decisive impact on handling. That’s true for new
The N on the sidewall makes all the difference. What it means: this tire has been approved by
Just how much effort goes into a simple letter on the sidewall is apparent only to someone who witnesses what takes place on the picturesque testing grounds in the Piedmont region of Italy. Airplanes from the nearby Milan Malpensa Airport draw white streaks in the steel-blue sky, but the test track is inundated with water for the important discipline of wet-surface handling. The spray kicks up as Walter Röhrl expertly pushes the Riviera Blue 993 RS into the corner. He wants to know: Does the tire demonstrate the unflappable balance that can single-handedly guarantee a good test result, even when driven at the limit? Röhrl’s satisfied expression provides a definitive answer: “It’s good.” He then elaborates: “The best thing is when the tire directly imparts what is happening beneath the tires to the driver’s hand through the steering system. The highly sensitive steering in all
Satisfaction in 33 steps. That is the number of test criteria that have to be fulfilled. Only then does a tire attain the approval of
State-of-the-art tires that look exactly like a Pirelli Cinturato of the 1960s—which is not merely a jewel in the crown of every concours d’elegance, but also an outstanding driving tire, confirms Dieter Röscheisen, a
After this test, there will be some two hundred new, model-specific tire approvals for sixteen
And to make traveling to the race on your own power possible in the best tradition of the old-school racers, a semi-slick model, the P Zero Trofeo R, has now joined the ranks of the N graduates. Semi-slicks differ from conventional tires in their more rigid shoulder areas and casings, and they have a softer rubber mixture than the normal tires offered for the
By Michl Koch
Photos by Christoph Bauer
* Data determined in accordance with the measurement method required by law. Since 1 September 2017 certain new cars have been type approved in accordance with the Worldwide Harmonised Light Vehicles Test Procedure (WLTP), a more realistic test procedure to measure fuel/electricity consumption and CO₂ emissions. As of 1 September 2018 the WLTP replaced the New European Driving Cycle (NEDC). Due to the more realistic test conditions, the fuel/electricity consumption and CO₂ emission values determined in accordance with the WLTP will, in many cases, be higher than those determined in accordance with the NEDC. This may lead to corresponding changes in vehicle taxation from 1 September 2018. You can find more information on the difference between WLTP and NEDC at www.porsche.com/wltp.
Currently, we are still obliged to provide the NEDC values, regardless of the type approval process used. The additional reporting of the WLTP values is voluntary until their obligatory use. As far as new cars (which are type approved in accordance with the WLTP) are concerned, the NEDC values will, therefore, be derived from the WLTP values during the transition period. To the extent that NEDC values are given as ranges, these do not relate to a single, individual car and do not constitute part of the offer. They are intended solely as a means of comparing different types of vehicle. Extra features and accessories (attachments, tyre formats, etc.) can change relevant vehicle parameters such as weight, rolling resistance and aerodynamics and, in addition to weather and traffic conditions, as well as individual handling, can affect the fuel/electricity consumption, CO₂ emissions and performance values of a car.
** Important information about the all-electric