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Jaguar XJ50 Road Trip Review | Driving the XJ50's history

PARIS, France – It's motor show week in Paris, and Jaguar – which launched the original XJ here in 1968 – is indulging in a little nostalgia to celebrate the 50th anniversary that event. In the half century since, it's become the brand's definitive model – as the Wrangler is to Jeep and the 911 is to Porsche. This sexy, curvaceous and unashamedly sporty sedan set the template for generations of XJs. And to get to the show, I'm going to drive examples of each on a roadtrip from Jaguar's home in Coventry and onward to Paris, via Goodwood and Le Mans. There's new product to enjoy along the way, too, in the shape of the celebratory XJ50 trim level created to mark the anniversary. But this is really a chance to explore Jaguar's past, and how previous XJs will inform the company's future. Respecting traditions without being chained to them is a recurring theme in the XJ story and one Jaguar has, at times, struggled with. Nobody understands this better than design boss Ian Callum, who says the original XJ inspired his dream to one day design cars for Jaguar. When his moment came, however, the opposing pressures of nostalgia and innovation became apparent. He recalls seeing the clay models for the circa 2002 XJ, code named X350, styling for which had already been signed off when he started. "I asked 'this is the new one?' because, to me, it looked just like the old version," he says with characteristic bluntness. Callum's chance to truly reinvent the XJ finally came in 2009 with the current model, a car that jolted Jaguar and its customers out of their comfortable slumber. "It's nearly 10 years old now but I still think it looks good – I'm very proud of what we did with that car," he says. Professionally Callum is always looking ahead. Personally he's happy to indulge himself in what came before. He even brought his own XJC – the rare coupe version of the 70s XJ – to drive on the event. Sadly, the XJC didn't make it off the start line in England, but he's clearly enjoying the chance to immerse himself in XJ history. As am I. Given his appraisal of its retro looks, it's interesting to start in the X350. Here you encounter those aforementioned opposing forces: the forward-thinking aluminum construction (which inspired manufacturing techniques used by Jaguar to this day) and the staid styling. Like many of the heritage fleet examples here, this one is actually badged as a Daimler – to Jaguar what Maybach is to Mercedes.

Jaguar Land Rover offers (some) detail about new Ingenium engine

Jaguar Land Rover officially announced its Ingenium family of engines with the unveiling of the 2.0-liter version in the Jaguar XE concept at the 2014 Geneva Motor Show, but it kept details very thin at the time. All we knew was that the new turbocharged mills could be configured to use gasoline or diesel, and be positioned longitudinally or transversely. Months later, JLR is finally letting some more info slip about its new baby, but there are still some big questions to be answered.
For the Ingenium project, Jaguar Land Rover gave its engineers a clean sheet of paper and told them not to worry about using any previous parts or machinery. In the end, the designers came up with a family of turbocharged, aluminum-block engines based around modular, 500cc cylinders to allow it to grow or shrink as the market demanded. The layout was also made adaptable enough to incorporate hybrid drivetrains, if needed. "Being configurable and flexible are the two key strands of Ingenium's DNA because we have future-proofed our new engines from the outset," said said Ron Lee, the company's director of Powertrain Engineering.
To maximize efficiency, Jaguar promises that all versions of the Ingenium engines come with computer-controlled, variable oil pumps and water pumps to use only as much energy as needed. They also get direct injection, roller bearings for the cams and stop/start. The diesel version alone has 17 percent less internal friction than the mill it replaces, the company claims. JLR is also promising class-leading figures for Ingenium's torque and horsepower too, but it's not giving away those specs just yet.

Jaguar's XF diesel isn't just fuel efficient, it's the cheapest XF available

Jaguar announced the 2017 Jaguar XF will now offer the 2.0-liter turbocharged diesel the company introduced on the XE. In addition to returning an impressive 42 miles per gallon on the highway and 31 in the city, the diesel is the cheapest XF available at $48,445. This means that picking the oil-burner will save you $3,040 over the cheapest gas V6 version, which only manages 29 mpg on the highway and 20 in the city. With 180 horsepower, the diesel is significantly down on power compared with the base V6 model. As a result, the diesel moves slower. Jaguar estimates the base V6 is good for a 5.2-second 0-60 time and the diesel should be able to do the same in 8 seconds. However, that's the only real downside. Even with the slower acceleration times, the diesel still has a very usable 317 lb-ft of torque available from 1,750-2,500 rpm. Based on our test drive of a diesel-equipped XE, the engine also breaks the old diesel stereotypes. It's both quite smooth and responsive. Unless you seriously need that straight-line performance, the Jaguar XF diesel arguably makes the most sense. It provides significant price savings and better fuel economy. The diesel XF also joins the XE and F-Pace diesels, leaving just the XJ and F-Type as the only Jaguars without compression-ignition engines. The British automaker is planning to remedy that, as a Jaguar Land Rover executive said the company plans to also add a diesel XJ variant in the US, even in the wake of the VW diesel scandal. Related Video: Related Gallery 2016 Jaguar XF: Review View 24 Photos Image Credit: Jaguar Land Rover Green Jaguar Diesel Vehicles Luxury Sedan jaguar land rover ingenium