| Composition | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Tuner | has a digital | has a digital |
| CD players | yes | yes |
| MP3-players | yes | yes |
| DVD-player | no | yes |
| Blu-ray player | no | no |
| Amplifier | yes | yes |
| Equalizer | yes | yes |
| Navigator | no | no |
| TV tuner | no | no |
| General characteristics | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Maximum power | 4x50 W | 4x50 W |
| Size | 1 DIN | 2 DIN |
| Management changer | CD | CD, DVD |
| CD-changer interface is | custom | IP-Bus (Pioneer) |
| Color | silver | black |
| Supported carriers and formats | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Formats | CD Audio, MP3 | CD-Audio, DVD-Video, MP3, MPEG4, WMA, AAC, JPEG |
| Media | CD-R, CD-RW | CD-R, CD-RW, VCD, DVD R, DVD RW |
| Memory card support | | SD, MMC |
| Decoder | | Dolby Digital, DTS |
| Standards support | | PAL, SECAM, NTSC |
| Display | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Display type | multicolor | multicolor |
| Display diagonal | | 7 inch |
| Display format | | 16:9 |
| Angle adjustment panel | | yes |
| Management | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Multicolor lighting | yes | yes |
| Infrared remote | yes | yes |
| Joystick on the steering wheel | no | no |
| Pause when speaking on the phone | yes | yes |
| Memory disk names | yes | |
| Search for a folder/file | | yes |
| Auto plants | | yes |
| Interfaces | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Audio input on the front panel | no | no |
| Outputs | audio | composite video |
| Bluetooth Support | no | no |
| Gold-plated connectors | yes | |
| Inputs | | video composite video USB |
| Supports rear-view camera | | yes |
| Protection | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Detachable panel | yes | |
| Tuner | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Support band | FM, MW, LW | FM, MW |
| RDS | RDS RDS PTY | |
| Number of preset FM/AM | 18 / 6 | |
| Tuner with long reception | | yes |
| Additional information | KENWOOD Z 638 | Pioneer AVH-P4250DVD |
| Adjusting the voice | yes | yes |
| Single-bit DAC architecture | yes | |
| ID3 tag support | no | yes |
| CD-text | yes | yes |
| Resampling audio | 8 | |
| Tone compensation | yes | |
| Dimensions (WxHxD) | 180x50x160 mm | 178x100x180 mm |
| Features | Display 3DFL. Sleep timer (20/40/60 min). Possibility to change the button illumination. Calendar with memory. | |
