Last week, Elon Musk announced the Tesla Model S had set a new lap record for four-door sedans at Laguna Seca. In the meantime, Tesla has also been preparing to attempt a new lap record at the Nurburgring to beat the Porsche Taycan, which currently holds the record for the fastest four-door EV at the Green Hell.

A modified prototype Model S finished in red was spotted last week preparing to attack the Nurburgring, and now our spy photographers have discovered a new blue prototype being thrashed around the famous German racing circuit. A record attempt is expected to be made tomorrow, but the Model S has already beaten the Taycan's time by a huge margin according to German publication Auto Motor Und Sport.

The publication claims the Model S beat Porsche's lap record by nearly 20 seconds. A reporter recorded a hand-stopped lap time of seven minutes 23 seconds for the Model S, while the Taycan took seven minutes and 42 seconds. Behind the wheel was German racing driver Thomas Mutsch, according to the publication. That's a very impressive time, but there are a few caveats.

This wasn't an ordinary Model S, but a modified prototype equipped with wider fender flares, larger wheels with grippy Goodyear Eagle F1 Supersport RS tires and carbon-ceramic brakes, and a trunk lip spoiler. A roll cage was also installed inside and the lower grille opening has been enlarged.

It hasn't been confirmed if the powertrain has been modified for the Nurburgring, but the prototype that set a record lap time at Laguna Seca was fitted with Tesla's more powerful Plaid powertrain featuring three electric motors instead of two, which will be offered in the Model S, Model X, and Roadster.

It's worth noting, however, that the record-breaking Taycan was also a pre-production prototype. Nothing official has been announced yet, but we'll hopefully find out later this week if Tesla really has beaten the Porsche Taycan's Nurburgring lap record.