Let's say you what a VW Golf GTI or a Jaguar XFR or even a Porsche Cayenne Turbo.
But you'd like to turn their performance all the way up to eleven.
Well that's why you can get a Golf GTI Performance Pack, a Jaguar XFR S and even a Porsche Cayenne
Turbo S.
However, are these highly-tuned models really worth the extra cash?
To find out, I'm going to be comparing them on track with their standard versions.
In this video we have the Jaguar XFR-S up against the normal XFR.
The standard Jaguar XFR has a 5 litre supercharged engine with 503bhp and 625Nm of torque.
It can do 0-62mph in 4.9 seconds before reaching an electronically limited top speed of 155mph.
It costs £65,380.
The XFR-S costs an extra £14,615, but for that you get an extra 39bhp and 55Nm torque.
0-62 falls to 4.6 seconds and you can reach a top speed of 186mph.
It also gets a louder exhaust, tweaked gearbox, stiffer chassis and firmer suspension.
Does all this make the standard XFR feel lacking when you get out on track?
Lovely V8 noise, gearbox has a relatively smooth shift.
Coming down to second here, you can feel that the car is relatively soft for a performance
car but it changes direction well.
Bit of understeer there but you're only a throttle press away from dialling in some
oversteer.
110mph now, hard on the brakes, down to 3rd, down to 2nd.
Lots of torque but 2nd is needed here, just there a bit of wheelspin.
When the car is loaded there's a bit of twist and you need to make sure the unloaded wheel
doesn't sin up.
You can feel a little cherup as the rear wheel starts to light up.
It's a constant battle managing traction to extract the lap time.
You can drive this car really sideways- it's got a lovely light feel to it.
It's such an engaging chassis but to get a lap time you have to manage the oversteer.
Quite hard work through that high-speed change of direction.
Round the corner, to 3rd, more wheelspin.
Trying to keep it neat really.
Trying not to have the car sliding or losing traction.
And across the line.
The standard XFR completed the flying lap in 01:14:30.
Can the XFR-S go any quicker?
The first thing you notice is that you can feel the extra power but it's not night-and-day
difference.
As soon as you come to a corner you can feel the difference.
There's so much torque, so when there's a long corner and the standard car's having
a bit of understeer that moves into oversteer, wheras this one's just planted.
There are a lot of physical changes to this car, you can really feel it - it's so much
tauter than the standard car.
When it transitions into oversteer the diff is so much better - it's smooth rather than
spinning the unloaded wheel.
There's more feel in the steering too.
When it oversteers it's really smooth and it's a much tauter car than the standard XFR.
It's still quite an oversteer-y muscle car, don't get em wrong, but it's a much different
feel to the standard car.
Everything's honed, tight down, sharper -makes the standard XFR feel like a stocky executive
saloon, a testament to this car.
And across the line.
The Jaguar XFR-S was 1.6 secs quicker than the standard XFR - but is it worth the extra
money?
If you rate driving pleasure above all else, then the answer is yes.
With its completely re-worked suspension and unique diff, the XFR-S feels like a completely
different car.