Put out 420 ft-lbs of torque, 29 ft-lbs (7%) more than the new V-8's, For comparison, the 1994 - 2002 12ģ89 hp, or just 7 hp (less than 2%) more than the new V-8. Torque is maintained throughout this entire band! Is a huge, flat peak from 2,800 to 4,800 RPM, in other words, peak Only does it have more valves, the compression ratio climbs fromġ0.0 : 1 to 10.7 : 1, further increasing power and fuel economy. Torque, a huge increase from the old three valve V-8 engines. The new 5.5-liter engine has 382 horsepower at 6,000 RPM and 391 ft-lbs. It, as most Mercedes engines these past decades, is made of aluminum. SL500, but downgraded them to three valves from 1999 - 2006. Mercedes introduced 32-valve quad cam V8s in the 1990
Mercedes finally returns to a four-valve engine for the SL550 Engine: A lot lies under that plastic vanity cover. See my SL500 pages for information on the previous models. The new 4.5 litre V8 isn't used in the SL-Klasse. It has 272 hp and hits 62 MPH in 6.6 seconds. It's the same thing Mercedes is banking on the considerable weight of the SL500 name. I predict any discount for a leftover will be swamped by being stuck with a model far less desirable than the new SL550 will be in several years.Įurope, the SL550 retains the name SL500. Since the SL550 is the same body for the same price as 2003 - 2006 SL500s, I would avoid any bargains on new-old-stock 2006 SL500s lying around on dealer lots. The new engine of the 2007 SL550 eclipses every other SL500. Improved engine in a midlife facelift of the 2003 - 2006 SL Klasse. SL550 debuted at the Geneva Auto Show in Switzerland in March, 2006. Spotters' guide: only three grille slats,
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