线程： 入门级捷豹 F 型的四锅引擎

测试骡子显示捷豹的计划，用来装备其 F-型跑车涡轮增压四缸汽油发动机。这 捷豹 F-型敞篷车被认为是捷豹工程开发原型 路虎 所有新的四缸涡轮增压发动机。
这辆车不仅有稍有不同的帽子，轻轻地凸起的中心部分，但它也显然是有一个排气系统的原型。
其流形上的只有一面四缸发动机，新的排气已被设计和细节工作，如优化后的压力，不得不进行。
去年 F-型车线总监伊恩 · 霍本话说，那里是整个主机的动力系统和传动系统，可以将其安装到 F-型体系结构。霍本说，他看到在拟合 F-型高输出涡轮增压四缸引擎的巨大潜力。
捷豹以前从未建立了四缸跑车 (虽然有计划进行的 XK120 的四缸版本)，但新一代的 Hotfire 涡轮增压发动机是极高的功率和扭矩输出的能力。
四缸 F 型将比 V6 发动机版本的总体略轻。它也应受益于提高灵活性，因为 Hotfire 引擎将进一步回坐在车鼻和放前轮，重量更轻，而燃油经济性应该有显著的提高。
然而，四罐 F 型是不太可能在 2015 年年底之前到达。捷豹路虎工程总监沃尔夫冈 · Ziebart 说第一次生产前 Hotfire 引擎将柴油和今年春天将滚下来新的 i54 工厂的生产线。他还声称新的引擎家庭将设置基准效率、 重量和功耗。
全规模生产的新的引擎在开始时在今年年底，所有引擎将为新的紧凑型捷豹轿车，它达到了汽油友好我们之前将在欧洲推出柴油车市场。
结果，任何入门级的 F 型是不太可能在 2015 年 9 月在法兰克福车展之前宣布的。

Test mule shows Jaguar's plans to equip its F-type sports car with a turbocharged four-cylinder petrol engine. This Jaguar F-type convertible is thought to be an engineering development prototype for Jaguar Land Rovers all-new four-cylinder turbocharged engine.
The car not only has a slightly different bonnet, with a gently raised centre section, but it also clearly has a prototype exhaust system.
For a four-cylinder engine with its manifold on only one side, a new exhaust has to be designed and detail work, such as optimising the back pressure, has to be carried out.
Last year F-type vehicle line director Ian Hoban was quoted as saying there was a whole host of powertrains and drivelines that could be fitted into the F-type architecture. Hoban said he saw great potential in fitting a high-output turbocharged four-cylinder engine to the F-type.
Jaguar has never before built a four-cylinder sports car (although there were plans for a four-cylinder version of the XK120), but the new generation of Hotfire turbocharged engines is capable of extremely high power and torque outputs.
A four-cylinder F-type will be slightly lighter overall than the V6-powered versions. It should also benefit from improved agility, because the Hotfire engine will sit further back in the cars nose and put less weight over the front wheels, while fuel economy should improve noticeably.
However, a four-pot F-type is unlikely to arrive before late 2015. JLR engineering director Wolfgang Ziebart says the first pre-production Hotfire engines will be diesel and will roll down the line at the new i54 factory this spring. He also claims the new engine family will set benchmarks in terms of efficiency, weight and power.
When full-scale production of the new engine begins at the end of this year, all the engines will be diesels for the new compact Jaguar saloon, which will be launched in Europe before it reaches the petrol-friendly US market.
As a result, any entry-level F-type is unlikely to be announced before the Frankfurt motor show in September 2015.