iPhone 8の仕様をiPhone 7と比較しながら下にまとめておきます。データはMactrackerからGeneral、Chip and Memory、Connectionsを転記。Mactrackerは単位をメートル、通貨を日本円に設定しました。
OVERVIEW
| iPhone 7 | iPhone 8 | |
| Introduced | September 2016 | September 2017 |
| Model Identifier | iPhone9,1 or iPhone9,3 | iPhone10,4 or iPhone10,4 |
| Model Number | A1660, A1778, A1779, A1780 | A1863, A1905, A1906, A1907 |
| EMC | 3091 | 3159, 3171, 3172 |
| Initial Price | ¥72,800 (32GB), ¥83,800 (128GB), ¥94,800 (256GB) | ¥78,800 (64GB), ¥95,800 (256GB) |
| Colors | Jet Black, Black, Silver, Gold, Rose Gold | Space Gray, Silver, Gold |
| Weight and Dimensions | 138 grams, H138.3 x W67.1 x D7.1 mm | 148 grams, H138.4 x W67.3 x D7.3 mm |
| DISPLAY | Retina HD LED-backlit LCD display with IPS technology | Retina HD LED-backlit LCD display with IPS technology |
| Display Size | 120-mm (diagonal) widescreen | 120-mm (diagonal) widescreen |
| Display Resolution | 1334-by-750 pixel resolution | 1334-by-750-pixel resolution |
| Display Mode | AirPlay Mirroring, photos, audio, and video out to Apple TV (2nd generation or later), Up to 1080p through Lightning Digital AV Adapter and Lightning to VGA Adapter | AirPlay Mirroring, photos, audio, and video out to Apple TV (2nd generation or later), Up to 1080p through Lightning Digital AV Adapter and Lightning to VGA Adapter |
| Brightness | 625 cd/m2 | 625 cd/m2 |
| Pixel Density | 326 ppi | 326 ppi |
| STORAGE | ||
| Capacity | 32, 128, or 256GB | 64, or 256GB |
| Input Method | 3D Touch | 3D Touch |
| Touch ID | Fingerprint identity sensor built into the Home button | Fingerprint identity sensor built into the Home button |
寸法と重量が若干異なるのはバッテリーのためでしょうか。ディスプレイは同一パーツを使用していると思われます。iPhone 8の背面がガラスであることも特筆すべき点です。
Chip and Memory
| PROCESSOR | iPhone 7 | iPhone 8 |
| Processor | Apple A10 Fusion | Apple A11 Bionic |
| Processor Speed | 2.3 GHz | 2.4 GHz |
| Architecture | 64-bit | 64-bit |
| Number of Cores | 4 (2 – high-performance, 2 – high-efficiency) | 6 (2 – high-performance, 4 – high-efficiency) |
| Coprocessor | Apple M10 motion | Apple M11 motion |
| Built-in Memory | 2 GB | 2 GB |
| Graphics Card | N/A | Apple GPU |
| Number of Cores | 6 | 3 |
搭載メモリは同じ2GBですが、チップが新しくなってコアの数も異なり、処理速度が向上していると思われます。
CONNECTIONS
| iPhone 7 | iPhone 8 | |
| Ports | Lightning connector | Lightning connector |
| Wi-Fi | 802.11a/b/g/n/ac with MIMO | 802.11a/b/g/n/ac with MIMO |
| Bluetooth | Bluetooth 4.2 | Bluetooth 5.0 |
| NFC | Yes | NFC, FeliCa |
| Networks | A1660: FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30), TD-LTE (Bands 38, 39, 40, 41), TD-SCDMA 1900 (F), 2000 (A), CDMA EV-DO Rev. A (800, 1900, 2100 MHz), UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz), GSM/EDGE (850, 900, 1800, 1900 MHz) A1778: FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30), TD-LTE (Bands 38, 39, 40, 41), UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz), GSM/EDGE (850, 900, 1800, 1900 MHz) | A1863: FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66), TD-LTE (Bands 34, 38, 39, 40, 41), TD-SCDMA 1900 (F), 2000 (A), CDMA EV-DO Rev. A (800, 1900, 2100 MHz), UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz), GSM/EDGE (850, 900, 1800, 1900 MHz) A1905: FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66), TD-LTE (Bands 34, 38, 39, 40, 41), UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz), GSM/EDGE (850, 900, 1800, 1900 MHz) A1906: FDD-LTE（Bands 1,2, 3, 4, 5, 7, 8, 11, 12, 13, 17, 18, 19, 20, 21, 25, 26, 28, 29, 30, 66), TD-LTE（Bands 34, 38, 39, 40, 41, 42), TD-SCDMA 1900（F), 2000（A), CDMA EV-DO Rev. A（800, 1900, 2100 MHz), UMTS/HSPA+/DC-HSDPA（850, 900, 1700/2100, 1900, 2100 MHz), GSM/EDGE（850, 900, 1800, 1900 MHz) |
| SIM slot | nano-SIM | nano-SIM |
| Location | Assisted GPS, GLONASS, Digital compass | Assisted GPS, GLONASS, Galileo, QZSS, Digital compass |
| Camera | 1 – 12 megapixels with optical image stabilization (iSight), 1 – 7 megapixels (FaceTime) | 1 – 12 megapixels with optical image stabilization (Back), 1 – 7 megapixels (FaceTime HD) |
| Audio In | 3 – Microphones | 4 – Microphones |
| Audio Out | 2 – Built-in speakers | 2 – Built-in speakers |
| Sensors | Proximity, Ambient light, Three-axis gyro, Accelerometer, Barometer | Proximity, Ambient light, Three-axis gyro, Accelerometer, Barometer |
| Battery | Built-in 7.45-watt-hour rechargeable lithium-ion | Built-in 6.96-watt-hour rechargeable lithium-ion |
| Battery Capacity | 1960 mAh | 1821 mAh |
| Battery Life | Talk time: Up to 14 hours on 3G Standby time: Up to 10 days Internet use: Up to 12 hours on 3G, up to 12 hours on LTE, up to 14 hours on Wi-Fi Video playback: Up to 13 hours Audio playback: Up to 40 hours | Talk time (wireless): Up to 14 hours Internet use: Up to 12 hours Video playback (wireless): Up to 13 hours Audio playback (wireless): Up to 40 hours |
| Power Adapter | Apple 5W or 12W USB Power Adapter | Apple 5W or 12W USB Power Adapter, wireless charging with Qi chargers |
| Operating Temperature | 0º to 35ºC | 0º to 35ºC |
| Nonoperating Temperature | -20º to 45ºC | -20º to 45ºC |
| Relative Humidity | 5 percent to 95 percent noncondensing | 5 percent to 95 percent noncondensing |
| Maximum Operating Altitude | 3000m | 3000m |
| Water Resistance | IP67 under IEC standard 60529 | IP67 under IEC standard 60529 |
Bluetoothが4.2から5.0になり、マイクの数が3個から4個に増えました。バッテリーの容量が1960 mAhから1821 mAhに少なくなっていますが、バッテリー性能は変わらず。iPhone 8にはワヤレスチャージャーが搭載されました。