Rather thumping with its full force from 2000rpm the rate of acceleration builds progressively until, in the
very upper reaches of the rev range, the performance becomes so intense that you must fight the urge to change up early.
The engine is responsive and it has a distinct vocal character — further improved by the optional sports exhaust — but with peak power arriving before 6000rpm it's not an engine that lights up in
the upper reaches of the rev range.
Admittedly, you won't be embarrassed away from the lights around town, but on the open road, you soon learn to keep the engine spinning away in
the upper reaches of the rev range to get the best from it.
It's smooth enough - moreso than the three - cylinder turbocharged petrols that now proliferate in this class - but begins to lose its composure towards
the upper reaches of the rev range.
It sounds sensational in
the upper reaches of the rev range, with a bark that's borderline BDA and a scintillating throttle response that begs you to brrapp - brrapp every single downshift.
Unlike some modern turbocharged units though, the V12 rewards you for exploring
the upper reaches of the rev range, while eliciting that trademark Aston Martin bark.
The engine doesn't seem particularly eager in
the upper reaches of its rev range (likely due to the period's archaic emissions technology), but it sounds pretty good doing it, gurgling out a subdued, mechanical straight - six song.
And it is addictive: We found ourselves dropping back a gear at almost every opportunity, just to experience the sheer explosiveness concentrated in
the upper reaches of the rev range.
It's been written about many times over so I'll spare you the in depth technical explanation, but it essentially enables the inlet valves to stay open long in
the upper reaches of the rev range.
Although the new 1.8 - liter turbo makes the same 170 horsepower as the now - retired five - banger, it generates a bigger dollop of torque (184 lb - ft) and holds that from a just - above - fast - idle 1500 rpm to
the upper reaches of the rev range.
In relaxed driving it's quiet enough and only takes on a harsh note in
the upper reaches of the rev range, but it feels breathless when extended and throttle response is on the slow side.
For all the engine's verve, it's somewhat tuneless compared to a Ferrari V8 or Audi V10, especially in
the upper reaches of the rev range.
In Dynamic though it becomes much more responsive, but also tends to put the engine in
the upper reaches of the rev range, resulting in lot of engine noise.
Sport mode also opens a valve in the exhaust, giving you a more sonorous experience to match the rush of power found in
the upper reaches of the rev range.
However, the GLE's motor is pleasantly refined in all but
the upper reaches of its rev range and, with a stout 457 lb ft of torque on tap at 1600rpm, is flexible across a wide spread of revs.