Bugatti among the pioneers in auto records, longest car, first production car to 100mph

Longest Wheelbase - Bugatti Royale 4.57 m (180 in)
http://en.wikipedia.org/wiki/List_of_automotive_superlatives

the world’s first 100 mph production car
http://driven.urbandaddy.com/2011/06/20/behind-the-wheel-jean-bugatti/
and http://en.wikipedia.org/wiki/Bugatti_Type_49 credits the Type 43 of 1927-31

Baskin Robbins ice cream says "Burt Baskin owned a 1931 Rolls Royce Phantom II, the world's first 100 mph passenger car" http://www.baskinrobbins.com/about/funfacts.aspx of course, the catch is that they call the Rolls a "Passenger" car, and not a "Production" car, of which the Bugatti is barely a production car, being hand built, race cars by design

And contending the record is a Gobron-Brillie

On July 21, 1904 in Ostend, Belgium Louis Rigolly stepped into his Gobron-Brillié ready to drive down the Ostend-Newport road.

This was no ordinary drive however, as Louis Rigolly pushed his 15-liter Gobron-Brillié  to an unheard of 103.56 MPH.

http://thelongestlistofthelongeststuffatthelongestdomainnameatlonglast.com/first381.html
And who or what measured that speed in 1904 Belgium? Down to 2 decimal places even!

But that is backed up by http://glostransporthistory.visit-gloucestershire.co.uk/WLSR_Gloucestershire.html which details the date and engine size
On 21 July 1904, a 13 1/2 litre opposed piston Gobron-Brillie