The first thing to realise is that this is no ordinary hot hatch. Under the bonnet, you will find VW's punchy 1.9-litre, 128bhp turbodiesel engine, which not only offers thump-in-the-back performance, thanks to an impressive 310Nm of torque, but also returns 55.4mpg.
While the official 0-62mph time of 9.3 seconds doesn't seem particularly impressive, in the real world the gutsy six-speed Polo feels far quicker than that figure suggests. The GT's sporty suspension set-up gives it decent handling too, with good body control and a comfortable ride over bumps.
So this Polo has the performance to earn its GT badge, but what about the styling? Apart from 16-inch alloy wheels and slightly lowered suspension, the new range-topping model looks virtually identical to all the other variants. Designers have placed plenty of GT badges inside and out, though.
And let's not forget that this isn't the first diesel hot hatch to be produced by the VW Group. Buyers also have the choice of Skoda's Fabia vRS and SEAT's Ibiza TDI FR - both use the same engine as the Polo GT while all three are based on the same platform.
As a result, you might expect the trio to fall into a similar price range. However, while the Skoda costs £11,990 and the SEAT is priced at £12,950, the VW weighs in at a hefty £14,750 in the five-door form driven here.
For that price you get equipment such as climate control, a dashboard-mounted six-disc CD changer and a leather-trimmed steering wheel. However, you do without any form of traction control - something that is fitted as standard to both the Skoda and SEAT. If the C2 VTS sits at the top of the hot hatch value charts, the Polo GT is stuck firmly at the bottom.
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