here's hoping the guy's lawyer is an SRT-4 fan...
Zero to 60 mph: 9.0 sec
Zero to 100 mph: 26.3 sec
Street start, 5–60 mph: 9.5 sec
Standing ¼-mile: 17.0 sec @ 82 mph
Top speed (governor limited):
109 mph
2008 Buick Enclave CXL AWD - Short Take Road Test - Auto Reviews - Car and Driver
so let's assume he was topped out and we'll call it a nice rounded 110.
cop sees him go by. decides to pull out on him. gets up to speed.. let's call it 130 to start with.
let's say it takes a total of 45 seconds for the cop gets up to 130 from when the guy blows by him.
we'll also forego the nasty integral math for a bit and assume the distance between the cop and the buick after the cop has gotten to 130mph is 1 mile.
let's now assume the actual distance for him to catch the guy is exactly 6 miles total chase distance.
the cop would need to maintain a constant speed of 132mph after that first mile to catch the buick in a distance of 5 miles, for a total chase distance of 6 miles, and the total time of chase after reaching the minimum 132mph speed was 2.725 minutes.
based on this rough workover I'd say the buick's top speed was probably no more than the 110mph and that the cop only needed to to 150mph for a short time once he realized hey, I'm not catching this guy all that quick.
time 2.725
speed (cop) 132
speed (buick) 110
distance (cop) 6.00
distance (buick) 5.00
delta 1.00