ENGINE

[Problem] To provide an engine capable of suppressing a larger pressure loss in an exhaust communication pipe connecting a turbocharger with an after-treatment unit. [0002] [Solution] An engine 1 is equipped with an engine body 2, a turbocharger 20, an exhaust gas purifier 40, an exhaust communication pipe 25. The turbocharger 20 is connected to the engine body 2.The exhaust gas purifier 40 purifies exhaust gas discharged from the turbocharger 20. The exhaust communication pipe 25 connects the turbocharger 20 with the exhaust gas purifier 40. The exhaust communication pipe 25 includes: a first connection member 60 that is connected to the turbocharger 20, and a second connection member 70 that connects the first connection member 60 with the exhaust gas purifier 40. A downstream end portion 62 of the first connection member 60 has an inner peripheral face 62a having a cross-section of a circular shape. An upstream end portion 61 of the first connection member 60 has an inner peripheral face 61a having a cross-section of an abnormal-shape that is different from the inner peripheral face 62a of the downstream end portion 62.