★直3エンジン_なぜ3気筒が増えている? [トヨタ][ヤマハ][BMW][メルセデス][ルノー][WV][プジョー][ダイハツ][トライアンフ]

3気筒と言えば軽自動車を思い浮かべることが多いと思いますが、 車格の大きな乗用車にも次々に搭載されています。 国内外のメーカーが３気筒に注目し始めた理由は何でしょうか？ エンジンの性能や全体のパッケージとしてメリットはあるのでしょうか？ 参照 https://www.youtube.com/watch?v=QYinsOv9Ry8 https://www.youtube.com/watch?v=WEfJanYbwr8 https://www.youtube.com/watch?v=tqNmadT43ws https://www.youtube.com/watch?v=A2SQDe8AcOA https://www.youtube.com/watch?v=J1QcXRrHiEA&t=338s https://www.youtube.com/watch?v=laZ7phyydPM&list=WL&index=10 https://www.youtube.com/watch?v=Z0SrQ4a8yf8 https://www.youtube.com/watch?v=E8AJ0-WCisA&list=WL&index=5 https://www.youtube.com/watch?v=EndcabT5ePM https://www.youtube.com/watch?v=bDT8y0WEfxo https://www.youtube.com/watch?v=zl-S8ahsdm4 https://www.youtube.com/watch?v=bBvPRpAiv7k https://www.youtube.com/watch?v=Rd6mUcqV8oY&list=WL&index=6 https://www.youtube.com/watch?v=DZe2uoAwktc&t=45s https://www.youtube.com/watch?v=32V9U-zKgNA&t=59s https://www.youtube.com/watch?v=yE53V0rYmZE&t=81s https://www.youtube.com/watch?v=Rt_AWy4tsN0&t=202s https://www.youtube.com/watch?v=V7inC4lOpGs&t=203s https://www.youtube.com/watch?v=mpln434igr4&t=12s https://www.youtube.com/watch?v=9BgQ3NGpHds&list=WL&index=5 https://www.youtube.com/watch?v=Rd6mUcqV8oY&t=11s https://www.youtube.com/watch?v=laZ7phyydPM&list=WL&index=12&t=14s https://www.youtube.com/watch?v=uAN6_8n8Pfo https://www.youtube.com/watch?v=yeP0kr4CXUI https://www.youtube.com/watch?v=0qGmEXKPKYw&list=WL&index=1 https://www.youtube.com/watch?v=8QQvLTcgJsE&list=PLtvfRMl5Fttp6gqljbbr6AiI3ngdBpD6f https://www.youtube.com/watch?v=8dHyDCb8-vE&t=21s https://www.youtube.com/watch?v=SAXoVSXnNTg&t=22s https://www.youtube.com/watch?v=pCsWm4cCMbs&list=WL&index=2&t=36s https://www.youtube.com/watch?v=mnbrEjN5MFs https://www.youtube.com/watch?v=mRROa_plpTc&t=408s https://www.youtube.com/watch?v=ZqUvL-Hrg5A https://www.youtube.com/watch?v=KGuwa4_xUDs https://www.youtube.com/watch?v=orshDR3yFuc https://www.youtube.com/watch?v=8m7goy4kNls https://www.youtube.com/watch?v=FNKAW2pXd-U https://www.youtube.com/watch?v=p3l-ZhmYt1I https://www.youtube.com/watch?v=2Qdsvy1FG50&t=235s https://www.youtube.com/watch?v=Lh4xMqL7GXM https://www.youtube.com/watch?v=D7nUGNpQjB0&list=PLa5S6UwF22IKADPxcx2LFrGjhIH0Y3uEn&index=3 https://www.youtube.com/watch?v=wEOrADk5wyc https://www.youtube.com/watch?v=lG3g8XclF4o&list=PLjUGX1CoBABn-6uRDzDrIUgr-z2d1sN7N&index=4 https://www.youtube.com/watch?v=IckxYoFUQI0&list=PLD042D0D02CF8156C&index=14 https://www.youtube.com/watch?v=SdqsgEOBOlc&list=PL9DB1FD0729FB3561&index=3 https://www.youtube.com/watch?v=wLa4Qftvgvs&t=126s https://www.youtube.com/watch?v=u8X4Bss1gls https://www.youtube.com/watch?v=UXkYkiR0xuQ https://www.youtube.com/watch?v=T5wCppCiQE8 https://www.youtube.com/watch?v=UdmGHKI2z4U&t=26s https://www.youtube.com/watch?v=xxPnWMWhYsY https://www.youtube.com/watch?v=P4VeicPprBA https://www.youtube.com/watch?v=A2SQDe8AcOA&t=35s https://www.youtube.com/watch?v=Z0SrQ4a8yf8 https://www.youtube.com/watch?v=hvpFcSPtDV0&t=37s