Not exact matches
Peak power climbs from 641bhp to 710bhp, torque from 500 lb ft to 568 lb ft and both outputs are produced
at lower engine speeds — 7000rpm for the former (250rpm
lower than a 650S), while the latter is available between 5500 and 6500rpm compared to the 650S where torque all arrives
at 6000rpm.
The six -
speed's top three ratios are very tall, but this
engine is flexible enough to pull decently from very
low revs, as
peak torque arrives
at only 1250 rpm.
It pulls with real determination and good response from very
low engine speeds — which tallies with
peak torque arriving
at just 1450rpm — and the mid-range is strong.
The 2.5 - liter's
peak also occurs 400 rpm
lower than in its smaller - displacement Japanese counterpart — whose
peak torque happens
at the same
engine speed as the previous - generation U.S. - spec WRX.
With an uncompromising, computer - controlled Ingenium
engine, the XE diesel maximizes
peak torque
at a
lower engine speed and goes from 0 to 60mph in 7.5 seconds.
Though the literal power band covers most of the operating RPM range, particularly in first gear (as there is no
lower gear to shift down to, and no «flat spot» in which the
engine does not produce any power), the effective band changes in each gear, becoming the range limited
at the upper end by either the limiter, or a point roughly located between
peak power and the redline where power drops off, and
at the
lower end the
engine's idling
speed.
The
low valve lift cam profile is used
at low to mid
engine speeds to maintain idling quality and reduce emissions, while the high lift cam profile is used when the
engine is spinning
at mid to high
engine speeds improve
peak horsepower and torque.
Minor turbo lag is evident
at low engine speeds despite the torque
peaking at rather mundane rpm, and the electronic power steering and shifter leave some room for improvement in terms of feel.
As a result of the benefits these technologies bring, a mono scroll turbocharger can be used to produce a class - leading
peak output, while maintaining response
at lower engine speeds and a high - revving power delivery.
In practice, the
low torque number limits theatrics off the line, while the
low gearing ratios of the six -
speed manual make the horsepower, which
peaks at 6,400 rpm, more generally available, as high
engine speeds are easily achieved.
The company claims the new
engine can quickly and easily surpass the maximum torque of the 1.8 - litre naturally - aspirated
engine it replaces
at relatively
low engine speeds, while achieving 230 Nm of
peak torque rivaling the performance of a typical 2.4 - litre naturally aspirated
engine.