autobild isn't known for thier reputable numbers, and never has been
note that the Veyron has a supposed lap time of 7:40 as well... all unsubstantiated. There are reasons why people trust Sport auto 1000 times more then anybody, with very few exceptions.
keep in mind that the LP640 also is a production version that HvS drove, and may be significantly different than that which Giorgio Sanna drove with full factory support. But, it is possible