The Dodge Challenger received two new engines across the lineup for the 2011 model year:
The SRT8 received a new 6.4-liter Hemi V8. The so-called 392 (although its actual size is 391 cu-in.) was officially rated at 470 hp (350 kW; 477 PS) and 470 lb·ft (640 N·m) of torque. Dodge engineers said they sacrificed peak horsepower ratings for low-end torque, stating a 90 lb-ft increase over the outgoing 6.1-L (370 c.i.d.) Hemi V8 at 2900 rpm. Two transmissions were offered: a 5-Speed Shiftable Automatic and a 6-speed manual. With the revised 6.4-Liter engine, Chrysler engineers cited a quarter mile (~400 m) time of 12.4 seconds at 110 mph (180 km/h) – bettering the outgoing 6.1-Liter Hemi by 0.8 seconds, although that figure has varied wildly between automotive magazines. Car and Driver tested the 392 at 12.9 seconds at 114 mph (183 km/h) while Motor Trend ran it at 13.0 seconds at 111.3 mph (179.1 km/h) and Edmunds' number was far closer to Chrysler's claimed numbers at 12.6 seconds at 112.1 mph (180.4 km/h).
The SE was renamed to SXT and received a new 3.6-liter Pentastar V6 engine producing 325 bhp (242 kW; 330 PS) and 288 lb·ft (390 N·m), replacing the former 3.5-liter V6.
The R/T received revisions including a new bottom grille cutout and an updated suspension.
The new SRT8's chin spoiler was enlarged to create more downforce. It resembles the 1970 Challenger R/T.
For the 2011 model year, Dodge also debuted and marketed a "392" version of the Challenger. This version is a reminiscence to 392 of the past, although the 6.4-liter displacement of this V8 actually equals 391 cubic inches.
For 2012, the base SE trim was renamed to SXT for consistency with the naming scheme of the remaining Dodge lineup. They came with the following equipment:
A 305-hp 3.6L Pentastar V6 with 268 lb·ft (363 N·m) of torque, dual rear Exhaust with bright tips, a five-speed automatic transmission with AutoStick, 18-inch aluminum wheels, advanced brake systems including: four-wheel disc antilock brakes, brake assist, ready alert braking and rain brake support, electronic stability control (ESC), with hill start assist and all-speed traction control, a chrome fuel filler door, Uconnect 130 System with AM/FM radio, CD player, six speakers and auxiliary input jack, steering wheel-mounted audio and speed control, twin hood scoops, touring suspension, remote keyless entry, six airbags, active front head restraints, premium cloth seating, six-way power driver seat with four-way power lumbar adjust, a leather-wrapped steering wheel, air conditioning with automatic temperature control, keyless enter and go with proximity sensor and push button start, power windows, locks & mirrors, a tilt/telescoping steering column and 60/40 folding rear seats that include a rear armrest with cup holders.
The 2009 SRT8, while still equipped with the 6.1L (370 cu in) Hemi V8, is virtually identical to its 2008 counterpart, with the main difference being the choice of either a 5-speed automatic or a 6-speed manual transmission. Standard features include Brembo brakes, a sport suspension, bi-xenon headlamps, heated leather sport seats, keyless go, Sirius satellite radio, and 20-inch (510 mm) forged aluminum wheels in addition to most amenities offered on the R/T and SE models such as air conditioning and cruise control. In addition, the 2009 had a true "limited slip" differential. A "Spring Special" SRT8 Challenger was also offered in B5 Blue, but due to rolling plant shutdowns, just over 250 Spring Special Challengers were built before the end of the 2009 model year. For 2010, SRT8 models added Detonator Yellow as an available color (at extra cost), and only with the optional "Special Edition Group". Yellow Challengers were only be built for a limited time (October/December 2009) in the 2010 model year. Another retro color, Plum Crazy Purple, was also available during Spring 2010 production, offered exclusively in the "Spring Special" package. Furious Fuchsia, similar to the 70s Panther Pink, was limited to one-day production at the Brampton, Ontario plant. The Furious Fuschsia Challengers, unlike previous limited edition Challengers, also featured a custom interior with white seats as well as black rims.
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