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" When a car company redesigns its offerings, it usually tries to add improvements: More passenger space, more cargo capacity, more luxury amenities. Customers want those things, but they tend to add weight and complexity, the dual enemies of performance. Sometimes, the automakers are successful, rolling out updated vehicles that are bigger, comfier, and faster. Other times, however, a performance model loses some of its edge in the process.  Here are ten examples of enthusiast-oriented vehicles that actually got slower when their makers tried to improve them. Hey, you can&amp;#039;t win &amp;#039;em all. 1. Ferrari F40 / F50  When he commissioned the F40, Enzo Ferrari himself told his engineers to &amp;quot;build a car to be the best in the world.&amp;quot; By many accounts, they succeeded, much to their own detriment: The F50 that followed was notably slower. Ferrari knew this, and thus banned auto journalists from doing instrumented testing on the F50 when it first came out. Chris Harris explains just how much of a performance advantage the F40 had over the newer, more technologically-advanced F50. 2. Lamborghini Miura / Countach  The Lamborghini Miura&amp;#039;s jaw-dropping, curvaceous body may have contributed to some awkward aerodynamics\u2014front-end lift was a serious problem at speed\u2014but its mid-mounted V12 provided plenty of push. In 1970, our pals at CAR and DRIVER reported a 0-60 time of 5 seconds flat. Come 1983, Lamborghini&amp;#039;s aggressively angular Countach 5000 S used an updated version of the same V12 that powered the Miura, but it took 0.4 seconds longer to reach 60 in C/D&amp;#039;s hands.  3. Honda Civic SI  At the other end of the spectrum from Lamborghinis and Ferraris, Honda&amp;#039;s perky Civic Si lost a whole bunch of speed when it went from a two-door coupe in 2000 to a three-door hatch in 2002. Despite still packing VTEC power, the addition of more than 150 pounds brought its 0-60 sprint down from a sprightly 7.2 seconds to 8.0. Perhaps not surprisingly, sales slowed down too. 4. Jeep Grand Cherokee SRT8  The first-generation Jeep Grand Cherokee SRT8 was a barnstormer, offering performance that competed with the likes of the Porsche Cayenne Turbo and BMW X5 M at a price more in line with your local Dodge/Chrysler/Jeep dealership. Zero-to-60 only took 4.5 seconds, and the noise was pure NASCAR rock and roll. After a redesign in 2012, the muscle Jeep got much more luxurious, with sharp new sheetmetal and a vastly improved interior, but 0-60 times stretched to 4.7 seconds. 5. Mazda Mazdaspeed 3  The same fate that befell the hot rod Jeep tamed some of the unruliness of the Mazdaspeed 3. The first generation of this muscle-hatchback screamed to 60 in 5.8 seconds in 2007, but it threatened to send you across two lanes of traffic while doing it. By 2010, the second-generation Mazdaspeed tried to be more serious, though it still suffered torque steer\u2014and took 6.1 seconds to reach the 60 mark. 6. Subaru WRX  The performance king of the Subaru lineup has always been the WRX STi, but the &amp;quot;regular&amp;quot; WRX has long been an excellent performance buy. That was especially the case in 2009, when a brand-new WRX could hit 60 in 4.7 seconds\u2014faster than the previous-generation STi. By 2015, though, the best 0-60 sprint you could expect was five seconds flat. 7. Dodge Neon SRT4 / Caliber SRT4  The Dodge Neon SRT4 was a flagrantly turbocharged beast, a torque-steering monster with barely any mufflers that set out to dominate the affordable performance segment nearly owned by Honda hot-rodders. It was cheap, unrefined, loud, and brash, and it blasted from 0-60 in an astonishing 5.3 seconds. The Caliber that followed could hardly keep up\u2014it tried to be a hot hatch and a crossover at the same time, and the added weight and dowdy styling doused the fires of twentysomething bravado that made the hottest Neon so lovably scruffy. What&amp;#039;s worse, it took a full 5.9 seconds to hit 60. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/car-culture/news/a26079/seven-fast-cars-that-got-slower-when-redesigned/>