It's Sports Series v Super Series in this latest straight-line duel.

The new McLaren 600LT is the pinnacle of performance for the marque's 'entry-level' Sports Series family, so how does it compare to its bigger brother – the 720S?

In a new video posted to YouTube, Hennessey Performance lines up a 600LT against a 720S for an old-school drag race.

We've seen numerous videos where the 720S comfortably out-sprints more expensive supercars and hypercars, so how does the smaller 600LT fare?

Before we find out, let's talk numbers. The 600LT is powered by a 3.8-litre twin-turbo V8 making 441kW and 620Nm, good for a claimed 0-100 time of 2.9 seconds. Meanwhile, the 720S makes 529kW and 770Nm from its larger 4.0-litre twin-turbo V8, and also claims to hit triple figures in 2.9 seconds.

So on paper they're fairly even, but how does that translate to the real world? Find out below: