yup bener..
menurut ane ,dohc memang lebih baik performanya.
Tetapi mesin Honda type R20 , walaupun SOHC , tetapi memiliki banyak peningkatan dibandingkan type K20.
Antaralain akselerasi dan grafik power band lebih baik.
FC juga signifikan lebih irit.
Contoh : CRV 2.0 gen 3 FC nya jauh lebih baik daripada crv 2.0 gen 2.
Design pistonnya lebih baik , lebih ringan dan kuat. Demikian juga dengan friksi antara piston dengan dinding silinder dibuat lebih minimal. Perbedaan utama adallah bore x stroke yang undersquare. Walau ada sedikit penurunan tenaga di rpm puncaknya. ini sudah jadi ciri undersquare engine. Tetapi overall lebih baik dari sebelumnya.
ini artikelnya
On paper, the new R20A engine actually fares pretty well against the out-going K20A engine - in the context of the CR-V (i.e. R20A as used on the new CR-V versus the K20A as used on the 2nd Gen CR-V). Both engines are approximately 2.0l in displacement, the R20A being 1c.c. smaller at 1997c.c. compared to 1998c.c. for the K20A. While the K20A was a square configuration (bore and stroke are equal), the R20A on the other hand is a greatly under-square design, with bore and stroke at 81.0mm X 96.9mm. By general rule of thumb, an undersquare configuration will offer superior low and mid-range torque compared to the square configuration, with some compromises in power delivery at high-rpm. Both the K20A and R20A offers a variable length intake manifold and both engines are tuned for smooth torque and power delivery rather than outright max power. Then the R20A also has the benefit of the new SOHC i-VTEC mechanism that offers excellent fuel economy during light throttle cruising conditions.
In terms of specifications, the R20A again compares quite well to the K20A. It delivers a max power of 110kW or 150ps at 6,200rpm with a max torque of 19.4kgm at 4,200rpm. The 2nd gen CR-V's K20A for the Malaysian domestic market meanwhile was rated 156ps at 6,500rpm, 6ps more but with the same max torque of 19.4km at 4000 rpm. However, note that this is for the Malaysian market and for most of ASEAN, the 2nd gen CR-V was actually rated at the same 150ps as the R20A. Thus, 2nd gen CR-Vs in Thailand, Singapore and so forth were all rated at 150ps instead of 156ps. But single figures like max power or max torque don't tell the whole story of course. With the R20A, Honda engineers has been particularly successful in exploiting the advantages of the undersquare design to deliver an overall better midrange torque/power delivery than the K20A. The chart on the left is cropped from a photo of one of the presentation foils of the technical overview that was presented to us (media) during the new CR-V launch as well as the media test-drive. Note how the torque curve of the R20A is smoother than that of the K20A to the extent that the R20A actually delivers slightly superior torque in the crucial areas of the mid-range rpm band. Bearing in mind the R20A CR-V is only offered with a 5AT, a superior mid-range is more important than outright top-end power and this is exactly where the R20A wins over the K20A in terms of power delivery.
Untung CR-V gen 3 masih dipertahankan pake besi walaupun bagian lainnya jd full plastik
Bagusnya masih tertolong dgn design interiornya yg modern dan lapang.
IMO
kang
