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Alfa Romeo 4C Spider brings roofless Italian performance to the well-heeled masses

Following through on its Geneva concept and year-end rumors, Alfa Romeo has introduced a roofless version of its mid-engine 4C at the 2015 Detroit Auto Show. Like the Lotus Elise, the canvas top on the 4C Spider isn't some fancy automatic roof. Instead, owners will need to manually sort things out. Unlike the Elise, at least, the 4C's top is easier to manage when both fixing and removing from the mid-engined sports car's body. For those that prefer the security provided by a hard top, a removable carbon-fiber roof will be added after launch. Aside from that change, most of the tweaks for the 4C Spider have to do with options and equipment. As we explained in our original post, opting for the topless version of this turbocharged Italian will still get you to 60 in just 4.1 seconds, while Alfa claims the 4C Spider can still pull 1.1 lateral g. Check out our full gallery of photos of the new 4C Spider, direct from the floor of the 2015 Detroit Auto Show, at the top of the page. And for more on Alfa's second US product, check out our original post, right here.

Stellantis reveals STLA Large platform with EV and ICE support

Hot on the heels of a Jeep Wagoneer S teaser and photos of the prototype next-generation Dodge Charger (or Challenger), comes a reveal and details of what will likely underpin both of them: the STLA Large platform. It's one of multiple Stellantis flexible architectures that will be the basis of its upcoming electric cars, and apparently internal combustion ones, too. Stellantis says the STLA Large platform will be for D- and E-segment cars, crossovers and SUVs. In other words, it will be for midsize and large vehicles. For reference, lengths supported will be from 187.6 to 201.8 inches, and width will range from 74.7 to 79.9 inches. It will be highly flexible, too, with Stellantis claiming significant amounts of adjustability in overhangs, wheelbase, suspension placement and powertrain arrangement. The powertrain flexibility is quite impressive. Front-, rear- and all-wheel-drive layouts will be supported. Single- and dual-motor layouts will be on offer. Internal combustion will be available, too, either on its own or as a hybrid. Apparently engines can be fitted either longitudinally or transversely, too. Battery packs with between 85 and 118 kWh of capacity will be offered, with Stellantis claiming that sedan-style vehicles could have a range of up to 500 miles. The packs will also be available in 400- and 800-volt designs. Stellantis noted also that the platform can "easily accept future energy storage technologies when they reach production readiness." This seems to hint that the company is looking at different battery chemistries and maybe even solid-state batteries that could be added more easily in the future. Furthermore, the platform is designed to handle impressive output. Stellantis says that some models on the platform will have 0-to-62 mph times in the 2-second range. Limited-slip differentials for improved power delivery and wheel-end disconnects for reduced mechanical drag are also on the table for this platform. All of these details fit well with the information previously given for the concept Dodge Charger Daytona Banshee and Jeep Wagoneer S. The former was previewed with both battery voltage architectures and a wide range of electric powertrains with between 456 and 670 horsepower depending on specification and upgrades. And that's just for the 400-volt system; the 800-volt option wasn't detailed. We've also seen photos of the Charger chassis seemingly with provisions for gas engines, likely versions of the Hurricane I6.

Lazzarini dreams up Ferrari-powered, Hennessey-tuned Alfa Romeo 4C

If there are any two firms you could count on to shoehorn a Ferrari V8 into the back of an Alfa Romeo 4C, they would almost certainly be Lazzarini Design and Hennessey Performance. The former already dreamt up doing the same with a Fiat 500, and the latter has been shattering records with a similar conversion performed on a Lotus Elise to turn it into the Venom GT. What you see here is their lovechild. Designed by Lazzarini and enhanced by Hennessey, the 4C Definitiva does – at least in theory – what Maserati was not prepared to do: shoehorn a Ferrari-sourced V8 engine into the back of Alfa's nimble little sports car. The powerplant is borrowed from the Ferrari 458 Italia and tuned by Hennessey to produce a claimed 738 horsepower and 532 pound-feet of torque. In a package weighing just 2,100 pounds, that's said to be enough to propel Frankenstein's four-wheeled monster to 60 miles per hour in a scant 2.5 seconds and across the quarter-mile in 9.5 seconds at 137 mph. Those are LaFerrari levels of performance. As you can see, the engine transplant calls for a widened rear track, and is accompanied by more aggressive aero as well. Of course, the design may be little more than an idea at the moment, but Lazzarini is apparently looking for customers to commission the first examples, at a reported price of 260,000 euros, which is about five times the going rate for a stock 4C and more than Ferrari gets for the 458 Speciale. Whether it's worth that much is one question. Whether Lazzarini and Hennessey could actually deliver on the promise is an even bigger one. Featured Gallery Alfa Romeo 4C Definitiva by Lazzarini Design View 10 Photos News Source: Lazzarini Design Aftermarket Alfa Romeo Coupe Concept Cars Supercars Hennessey alfa romeo 4c alfa 4c