Well, it more or less succeeded at both objectives. Reaching a straight line one-way top speed of 458 km/h (285 mph) and a combined two-way speed of 447 km/h (278 mph) in 2017. Granted, this would go on to be bested by the Veyron's successor, the Chiron. But for a brief period, the Agera was the fastest car in the world.
As for the Agera RSN, think of it like a normal version of the Agera RS with extra liberal helpings of special sauce limited to 25 units for the entire planet. With added goodies like a removable hard top, limited edition deep blue paint with black striping, and a fully revamped aerodynamics package, the Agera RSN was as good of a car as ever did come out of Sweden in the year 2018.
With 7,500 miles (12,070 km) on the odometer, it's clear the last owner wasn't an all-show, no-go garage princess. Whoever they were, they loved to drive the snot out of this 1,160 horsepower, five-liter turbo V8 monster. With most supercars, this mileage would throw a monkey wrench into the pricing. But one can only assume a car as special as this one is more protected from depreciation than the average Ferrari.
At an asking price of £3,600,000 ($4,371,027), this is a car for someone who'd rather drive themselves around in a cloud of tire smoke than be driven around in a Rolls-Royce or Maybach at slightly under the speed limit.