I've seen some extreme builds way past 500hp too, but those tend to be more show car type builds.
You can actually quite reliably get 450-500hp out of a 2.3 redblock without even spending that much money, redblocks are notorious in tuning communities for this, almost like the 2JZ of Sweden
240kmph is where the gearing ends on a 740 iirc. The biggest engine is a 2.3l turbo that makes 170 hp stock. however, very little work goes into getting it to 300hp. Upgraded turbo, clutch, injectors and an off the shelf chip tune that you simply slot in. Past 300hp and you're looking at beefier rods and most definitely transmission upgrade or a non existent third gear.
I find this hard to believe for a different reason. Your average car becomes quite hard to control at 160kph ish (barring a completely straight stretch of road). I cannot see a 15 year old surviving any instance of going over 250kph, much less something described as ‘escaping from the police’.
I had an old 240 with the naturally aspirated B230. Going 160 kph was not really a big issue, of course not in a tight corner, but OK on regular open roads in Sweden. But 250 kph is pushing the limits for sure.
And I think you're actually agreeing with GP here, since the outcome of those attempted escapes are typically fatal accidents rather than teen escaping.
All else being equal (initial engineering and handling), an older car has a lot more wear and play in the suspension components. If you haven't spent much time under a car, there's a surprising amount of rubber there in the form of bushings.
Over time, the rubber loses its resilience, and doesn't keep things located as they should be for best handling.
Metal on metal pivots wear as well, springs get less springy, dampers degrade in damping ability, etc.
You're unlikely to notice at regular speeds, apart from getting in a new car and the handling feeling sharper. I presume at high speed and under the sorts of maneuvers one might try as a teenager doing teenager things, the results could vary.
For sure a friend of mine had a very old EPA, it would be about 70 years today if it still exists. It could not go faster than 50kph because the handling combined with imbalance in something almost shook it off the road while going "straight".
Mostly because fat sidewalls and suspension tuning that prioritized comfort over having a lap time .04sec less than whatever other mom-mobile the Consumer Reports journalist is comparing yours to.
I find this hard to believe, a shoebox with wheels going that fast, even with the most powerful engine (2.0 L, 200 hp stock).